Using a formula to determine EOQ
1. Number of orders for a period = Total demand for that item of stock for the period (D) / Quantity ordered in units (Q)
2. Total ordering costs = No. of orders for a period x ordering costs per order (O) = (D/Q) x O = DO/Q
3. Total holding costs for a period = Average stock for the period x Holding costs per unit = (Q/2) x H = QH/2
4. Total relevant costs (TC) = DO/Q + QH/2
5. Differentiating the total cost function with respect to Q and setting the derivative equal to zero to determine the minimum point, gives the EOQ formula: Q=EOQ = √(2DO/H)