Mr john, have watched your free lectures on inventory control
The annual demand for an item of inventory is 45 units. The item costs $200 a unit to purchase, the holding cost for one unit for one year is 15% of the unit of cost and ordering costs are $300 and order. The supplier offers am 3% discount for orders of 60 units or more, and a discount of 5% for orders of 90 units or more.
Calculate the cost- minimising order size.
my question is, how come the discount is only accounted for in holding costs and not in ordering costs too.
The discount means that the purchase price is lower. Since the holding cost is a % of the purchase price, then since the purchase price is lower the holding cost is lower as well.