1:1 CLASS Calc
  2:3 FIELD items: multi Item
  4:3 METHOD run(mut total: Int, step: Int) -> Int
    5:5 LET base: Int = 10
    6:5 LET label = "sum"
    7:5 ASSIGN total = total + base * 2 - 1
    8:5 LET neg = -total
    9:5 IF total > 100
      10:7 ASSIGN label = label .. "-big"
    11:7 ELSE
      11:12 IF total > 50
        12:7 ASSIGN label = label .. "-mid"
      13:7 ELSE
        14:7 ASSIGN label = label .. "-small"
    16:5 WHILE total > 0
      17:7 ASSIGN total = total - step
    19:5 FOR item IN self.items
      20:7 EXPR item.touch()
      21:7 ASSIGN total = total + item.count
    23:5 IF neg > 0
      24:7 RETURN
    26:5 LET first = self.items[0]
    27:5 LET cache = PriceCache { entries: total, note: label }
    28:5 RETURN latest(self.items).amount
32:1 METHOD add(a: Int, b: Int) -> Int
  33:3 RETURN a + b