The annual demand, ordering cost, and the inventory carrying cost rate for a certain item are D=600 units, S=$(20)/() order and I=30% of item price. Price is established by the following quantity disc

What are the annual demand, ordering cost, and inventory carrying cost rate for a certain item?

A) D=600 units, S=$(20)/() order, I=30% of item price
B) D=600 units, S=$(20)/() order, I=30% of item price, P=quantity disc
C) D=600 units, S=$(20)/() order, I=30% of item price, P=quantity disc, Q=order quantity
D) D=600 units, S=$(20)/() order, I=30% of item price, P=quantity disc, Q=order quantity, C=carrying cost rate