Average and absolute quantity of storage fees
Average quantity: The storage fee is calculated by forwarding 30 days on the same day, adding up the inventory quantity at 00:01 each day, and then calculating the average quantity as the storage fee of the day;
For example, Inventory volume of the first 30 days / 30 = storage volume of the day，If five days of the first 30 days are out of stock, the formula is：Inventory volume of the first 30 days / 25 = storage volume of the day
Absolute quantity: Absolute quantity: that is, the storage fee is calculated according to the actual inventory quantity in the warehouse at 00:01 of the day;
For example, if the volume of the product in the warehouse at 00:01 on May 21 is 1 cubic meter, the absolute amount of storage fee on May 21 is 1 cubic meter.