File structure

gather/src/index.js

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+require('dotenv').config()
+const items = require('./items')
+const output = require('./output');
+
+(async () => {
+  for (const item of items) {
+    console.log(`Looking at ${item.name}`)
+
+    let partsPrice = 0
+    for (const part of item.parts) {
+      partsPrice += await part.getPrice()
+    }
+
+    const setPrice = await item.set.getPrice()
+    if (partsPrice < setPrice) {
+      output.addItem(item.name, partsPrice, setPrice)
+    }
+  }
+
+  output.submit()
+})()