While calculating EOQ, P stands for?

Formula for calculating EOQ (Q) =\(\sqrt\frac{2PD}{C} \) where
D= Annual Demand for the item (SKU)
P: Cost of placing and receiving one Order (does not include purchase price)
C: Inventory carrying cost per unit. This may be derived by multiplying the unit price of the item by the carrying cost expressed as %age of the unit price.
S: Safety Stock level for the item.