diff --git a/index.html b/index.html
index f7cb27e..994b137 100644
--- a/index.html
+++ b/index.html
@@ -19,12 +19,37 @@
     <div class="slot">
         <aside class="calculator">
             <div>
-
+                <div class="line-items">
+                    <div class="item">
+                        <span class="amount">1</span>
+                        <span class="value">5,50</span>
+                        <span class="name">Longdrink</span>
+                    </div>
+                </div>
+                <div class="calculator-summary">
+                    <span class="value">5,50</span>
+                </div>
+                <div class="calculator-action">
+                    <button>Abschluss</button>
+                </div>
             </div>
         </aside>
         <main class="controls">
             <div>
-
+                <div class="tab tab-controls active">
+                    <div class="product-grid">
+                        <button class="product">
+                            <img src="https://placehold.co/150x150" alt="Produkt 1" height="150" width="150">
+                            <span class="product-meta">
+                                <span class="name">Produkt 1</span>
+                                <span class="value">5,50</span>
+                            </span>
+                        </button>
+                    </div>
+                </div>
+                <div class="tab tab-settings">
+                    <h2>Einstellungen</h2>
+                </div>
             </div>
         </main>
     </div>
diff --git a/script/calculator.js b/script/calculator.js
new file mode 100644
index 0000000..e69de29
diff --git a/service-worker.js b/service-worker.js
index 3f914b8..96a966c 100644
--- a/service-worker.js
+++ b/service-worker.js
@@ -1,4 +1,5 @@
-const CACHE_NAME = 'produkt-rechner-v1';
+const CACHE_NAME = 'durst-rechner-v1';
+
 const FILES_TO_CACHE = [
     '/',
     '/index.html',
diff --git a/stylesheet.css b/stylesheet.css
index 6be0833..213fb67 100644
--- a/stylesheet.css
+++ b/stylesheet.css
@@ -6,6 +6,9 @@
     --aside-background-color: #dfdfdf;
     --aside-text-color: #000;
     --box-padding: 1em;
+    --currency-symbol: " €";
+    --amount-times-symbol: "x ";
+    --product-meta-separator: " — ";
 }
 html, body {
     height: 100%;
@@ -54,12 +57,106 @@ aside.calculator {
     height: 100%;
     box-shadow: 0 0 10px rgba(0, 0, 0, .5);
 }
-main.controls {
+aside.calculator .line-items {
     display: flex;
-    flex: 4 0 0;
+    flex-direction: column;
+    flex: 1 0 0;
+    box-sizing: border-box;
+}
+aside.calculator .line-summary {
+    display: flex;
+    flex-direction: column;
+    flex: 1 0 0;
+    box-sizing: border-box;
+}
+aside.calculator .calculator-action {
+    display: flex;
+    flex-direction: column;
+    justify-content: flex-end;
+}
+aside.calculator .calculator-action button {
+    display: flex;
+    width: 100%;
+    justify-content: center;
+    border: 1px solid black;
+    padding: .5em;
+    font-size: 1.2em;
 }
 aside.calculator > div,
 main.controls > div {
     padding: var(--box-padding);
     box-sizing: border-box;
+    width: 100%;
+}
+
+aside.calculator > div {
+    display: flex;
+    flex-direction: column;
+}
+aside.calculator .line-items {
+    gap: .3em;
+    overflow-y: auto;
+}
+aside.calculator .line-items .item {
+    font-size: 1.3em;
+}
+aside.calculator .line-items .item > .value::after {
+    content: var(--currency-symbol);
+}
+aside.calculator .line-items .item > .amount::after {
+    content: var(--amount-times-symbol);
+}
+aside.calculator .calculator-summary > .value {
+    display: flex;
+    font-size: 1.8em;
+    justify-content: center;
+    margin-bottom: .2em;
+}
+aside.calculator .calculator-summary > .value::after {
+    content: var(--currency-symbol);
+    padding-left: .2em;
+}
+main.controls {
+    display: flex;
+    flex: 4 0 0;
+}
+main.controls > div {
+    display: flex;
+    flex-direction: column;
+    gap: .5em;
+}
+main.controls > div > .tab {
+    display: none;
+}
+main.controls > div > .tab.active {
+    display: block;
+}
+main.controls > div > .tab.tab-controls .product-grid {
+    display: grid;
+    /* 3 per row*/
+    grid-template-columns: repeat(4, 1fr);
+    gap: .5em;
+    overflow-y: auto;
+    padding: var(--box-padding);
+}
+main.controls > div > .tab.tab-controls .product-grid .product {
+    display: flex;
+    flex-direction: column;
+    justify-content: center;
+    align-items: center;
+    padding: 1em;
+    border: 1px solid black;
+    border-radius: 5px;
+}
+main.controls > div > .tab.tab-controls .product-grid .product > .product-meta {
+    display: flex;
+    margin-top: .5em;
+}
+
+main.controls > div > .tab.tab-controls .product-grid .product .product-meta > *:not(:last-child)::after {
+    content: var(--product-meta-separator);
+    padding-right: .5em;
+}
+main.controls > div > .tab.tab-controls .product-grid .product .product-meta > .value::after {
+    content: var(--currency-symbol);
 }
\ No newline at end of file