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What do the following three numbers and brackets mean? Is the bigger the better?

Minute: the time to complete (for example, 5 minutes, etc.). ). The brackets behind are the percentage that your shop assistant can help you speed up the completion time.

Goods: required quantity (such as -27, that is, 27 pieces of goods). The brackets at the back are the percentage that your clerk can help you reduce the quantity of goods.

Income: How much can your staff help you earn?

The bigger the sales volume, the better, and the more money you can earn. The greater the management, the more money you can earn, but the time will be extended, and purchasing can reduce the number of goods you need.