Can anyone help me figure this out? TIA!

Q, and TC, assuming the following D #20,000 1 10% 2DO Qe onstant demand for the product, how many orders will be made in one year constant demand and a lag time of five days between order and receipt, how many units will be in stock when you place an order? Gven a constant demand, how many days will elapse between orders? What is the carrying cost? What is the opportunity cost? What is the cost of the average inventory? What is the volume of the average inventory? The hospital has only $90,000 budgeted for the product. What is the new price he hospital must negotiate with the vendor to make budget