CP value calculation

1. Enter the number of units, capacity, weight, and number of sheets of content per bottle or package.
2. The number of bottles purchased or the number of packages, the default is 1
3. Enter the amount
4. Confirm input, camera: the items photographed, easy to judge the appearance of goods appearance
5. Calculation results = number behind the larger number of units that buy the more the more cost-effective
6. Quality is still the first option to buy, can buy the number of units is only a reference