A local welding company keep an inventory of safety glasses to product their workers. On average, they need 6250 units safety glasses per year to safely perform the work. It costs 50 dollars per year to hold a safety glasses in inventory and 220 dollars to place an order from their supplier. Assume you are the inventory manager of the company and answer the following questions:

a. What is their optimal order quantity?

b. What is the yearly holding and ordering costs?

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