A fast-food restaurant buys hamburger buns from a local bakery. To estimate its costs, the restaurant assumes now those buns are used at the constant rate of 100 per day and are purchased at $0.025 per bun. It costs $1 for each order placed and the annual inventory holding cost per unit is 25% of the unit purchase cost. Work on Excel

a) How much should be ordered (in whole number) each time to minimize the restaurant's total annual costs?

And what is the length of order cycles (i.e. time between orders) in days given this economic order quantity? Assume the restaurant operates 360 days per year. b) If It takes 1 week for the supplier