diff --git a/src/App.vue b/src/App.vue
index 55df315..1757ae7 100644
--- a/src/App.vue
+++ b/src/App.vue
@@ -1,19 +1,75 @@
 <template>
-  <div id="app">
-    <img alt="Vue logo" src="./assets/logo.png">
-    <HelloWorld msg="Welcome to Your Vue.js App"/>
+  <div>
+    <div>Hot Liquid</div>
+    <temperature-slider
+      :initialValue="mainTemperature"
+      @value-changed="mainTemperature = parseInt($event)"
+    ></temperature-slider>
+
+    <div>Cool Liquid</div>
+    <temperature-slider
+      :initialValue="auxTemperature"
+      @value-changed="auxTemperature = parseInt($event)"
+    ></temperature-slider>
+
+    <div>Target Volume</div>
+    <volume-selector
+      :initialValue="targetVolume"
+      @value-changed="targetVolume = parseInt($event)"
+    >
+    </volume-selector>
+
+    <div>
+      Mix
+      <strong>{{ Number(mainVolume).toFixed(1) }}&nbsp;ml</strong> of hot liquid
+      with <strong>{{ Number(auxVolume).toFixed(1) }}&nbsp;ml</strong> of cool
+      liquid to achieve target temperature of {{ targetTemperature }}&nbsp;°C
+    </div>
   </div>
 </template>
 
 <script>
-import HelloWorld from './components/HelloWorld.vue'
+import TemperatureSlider from "./components/TemperatureSlider.vue";
+import VolumeSelector from "./components/VolumeSelector.vue";
 
 export default {
-  name: 'App',
+  name: "App",
   components: {
-    HelloWorld
-  }
-}
+    TemperatureSlider,
+    VolumeSelector,
+  },
+  data() {
+    return {
+      mainTemperature: 60,
+      auxTemperature: 20,
+      targetTemperature: 40,
+      targetVolume: 75,
+    };
+  },
+  computed: {
+    errors() {
+      if (this.targetTemperature === this.auxTemperature) {
+        return ["Target temperature must be greater than cool liquid"];
+      }
+      if (this.mainTemperature < this.targetTemperature) {
+        return ["Hot liquid temperature must be greater than target"];
+      }
+      return [];
+    },
+    tempRatio() {
+      return (
+        (this.mainTemperature - this.targetTemperature) /
+        (this.targetTemperature - this.auxTemperature)
+      );
+    },
+    mainVolume() {
+      return this.targetVolume / (1 + this.tempRatio);
+    },
+    auxVolume() {
+      return this.targetVolume - this.mainVolume;
+    },
+  },
+};
 </script>
 
 <style>
diff --git a/src/assets/logo.png b/src/assets/logo.png
deleted file mode 100644
index f3d2503..0000000
Binary files a/src/assets/logo.png and /dev/null differ
diff --git a/src/components/HelloWorld.vue b/src/components/HelloWorld.vue
deleted file mode 100644
index 879051a..0000000
--- a/src/components/HelloWorld.vue
+++ /dev/null
@@ -1,58 +0,0 @@
-<template>
-  <div class="hello">
-    <h1>{{ msg }}</h1>
-    <p>
-      For a guide and recipes on how to configure / customize this project,<br>
-      check out the
-      <a href="https://cli.vuejs.org" target="_blank" rel="noopener">vue-cli documentation</a>.
-    </p>
-    <h3>Installed CLI Plugins</h3>
-    <ul>
-      <li><a href="https://github.com/vuejs/vue-cli/tree/dev/packages/%40vue/cli-plugin-babel" target="_blank" rel="noopener">babel</a></li>
-      <li><a href="https://github.com/vuejs/vue-cli/tree/dev/packages/%40vue/cli-plugin-eslint" target="_blank" rel="noopener">eslint</a></li>
-    </ul>
-    <h3>Essential Links</h3>
-    <ul>
-      <li><a href="https://vuejs.org" target="_blank" rel="noopener">Core Docs</a></li>
-      <li><a href="https://forum.vuejs.org" target="_blank" rel="noopener">Forum</a></li>
-      <li><a href="https://chat.vuejs.org" target="_blank" rel="noopener">Community Chat</a></li>
-      <li><a href="https://twitter.com/vuejs" target="_blank" rel="noopener">Twitter</a></li>
-      <li><a href="https://news.vuejs.org" target="_blank" rel="noopener">News</a></li>
-    </ul>
-    <h3>Ecosystem</h3>
-    <ul>
-      <li><a href="https://router.vuejs.org" target="_blank" rel="noopener">vue-router</a></li>
-      <li><a href="https://vuex.vuejs.org" target="_blank" rel="noopener">vuex</a></li>
-      <li><a href="https://github.com/vuejs/vue-devtools#vue-devtools" target="_blank" rel="noopener">vue-devtools</a></li>
-      <li><a href="https://vue-loader.vuejs.org" target="_blank" rel="noopener">vue-loader</a></li>
-      <li><a href="https://github.com/vuejs/awesome-vue" target="_blank" rel="noopener">awesome-vue</a></li>
-    </ul>
-  </div>
-</template>
-
-<script>
-export default {
-  name: 'HelloWorld',
-  props: {
-    msg: String
-  }
-}
-</script>
-
-<!-- Add "scoped" attribute to limit CSS to this component only -->
-<style scoped>
-h3 {
-  margin: 40px 0 0;
-}
-ul {
-  list-style-type: none;
-  padding: 0;
-}
-li {
-  display: inline-block;
-  margin: 0 10px;
-}
-a {
-  color: #42b983;
-}
-</style>
diff --git a/src/components/TemperatureSlider.vue b/src/components/TemperatureSlider.vue
new file mode 100644
index 0000000..411ee02
--- /dev/null
+++ b/src/components/TemperatureSlider.vue
@@ -0,0 +1,34 @@
+<template>
+  <div class="temperature-slider">
+    <input
+      type="range"
+      min="15"
+      max="80"
+      v-model="value"
+      @change="valueChanged"
+    />
+    <span>{{ value }}&nbsp;°C</span>
+  </div>
+</template>
+
+<script>
+export default {
+  props: {
+    initialValue: Number,
+  },
+  emits: ["value-changed"],
+  data() {
+    return {
+      value: this.initialValue,
+    };
+  },
+  methods: {
+    valueChanged() {
+      this.$emit("value-changed", this.value);
+    },
+  },
+};
+</script>
+
+<style scoped>
+</style>
\ No newline at end of file
diff --git a/src/components/VolumeSelector.vue b/src/components/VolumeSelector.vue
new file mode 100644
index 0000000..4ea2252
--- /dev/null
+++ b/src/components/VolumeSelector.vue
@@ -0,0 +1,34 @@
+<template>
+  <div class="volume-selector">
+    <input
+      type="range"
+      min="0"
+      max="150"
+      v-model="value"
+      @change="valueChanged"
+    />
+    <span>{{ value }}&nbsp;ml</span>
+  </div>
+</template>
+
+<script>
+export default {
+  props: {
+    initialValue: Number,
+  },
+  emits: ["value-changed"],
+  data() {
+    return {
+      value: this.initialValue,
+    };
+  },
+  methods: {
+    valueChanged() {
+      this.$emit("value-changed", this.value);
+    },
+  },
+};
+</script>
+
+<style scoped>
+</style>
\ No newline at end of file