Add Travel Calculation Functions

index.js

@@ -1 +1,25 @@
-// Code your solution in this file!
+const hqBlock = 42
+const blockDistanceInFeet = 264
+
+const distanceFromHqInBlocks = (blockNumber) => {
+    return Math.abs(blockNumber - hqBlock)
+}
+
+const distanceFromHqInFeet = (blockNumber) => {
+    return blockDistanceInFeet * distanceFromHqInBlocks(blockNumber)
+}
+
+const distanceTravelledInFeet = (start, end) => {
+    return Math.abs(start - end) * blockDistanceInFeet
+}
+
+const calculatesFarePrice = (start, end) => {
+    const distance = distanceTravelledInFeet(start, end)
+    if (distance > 2500) {
+        return 'cannot travel that far';
+    } else if (distance > 2000) {
+        return 25;
+    } else {
+        return 0.02 * Math.max(0, (distance - 400));
+    }
+}