(60 pts) Demand for phones at Tech Inc. is 10,000 per month. The annual holding cost at Tech Inc. is 20 percent and the company incurred a fixed cost of $10,000 for each order placed. The supplier offers an all unit quantity discount with a price of $150 per phone for all orders under 5,000, a price of $145 for all orders of 5,000 or more but under 10,000 and a price of $140 for all orders of 10,000 or more. a. How many phones should Tech Inc. order per replenishment? Please show your computations clearly for full credit. b. If the supplier offers a marginal unit quantity discount with a price of $150 per phone for less than 1200 phones in an order, a price of $145 for more than or equal to 1200 and less than 3000 phones in the order, and a price of $140 for the quantity of 3000 and above in the order. How many phones should Tech Inc, order per replenishment? Please show your computations clearly for full credit. (60 pts) Demand for phones at Tech Inc. is 10,000 per month. The annual holding cost at Tech Inc. is 20 percent and the company incurred a fixed cost of $10,000 for each order placed. The supplier offers an all unit quantity discount with a price of $150 per phone for all orders under 5,000, a price of $145 for all orders of 5,000 or more but under 10,000 and a price of $140 for all orders of 10,000 or more. a. How many phones should Tech Inc. order per replenishment? Please show your computations clearly for full credit. b. If the supplier offers a marginal unit quantity discount with a price of $150 per phone for less than 1200 phones in an order, a price of $145 for more than or equal to 1200 and less than 3000 phones in the order, and a price of $140 for the quantity of 3000 and above in the order. How many phones should Tech Inc, order per replenishment? Please show your computations clearly for full credit