The Lemonade Ledger

Your lemonade stand closed for the day — time for real accounting. 🍋

You get the cups sold each hour, the price you charge per cup, and what each cup costs you to make. Print three lines: revenue <total earned>, cost <total spent>, profit <the difference>.

Example:

Input: cups = [12, 8, 15, 5], price = 3, costs = 1 Output:

revenue 120
cost 40
profit 80

Total cups sold is 40. Revenue is 40 × 3 = 120, cost is 40 × 1 = 40, and profit is 120 - 40 = 80.