Bean's coffee shop expects total sales of ugly coffee mugs to be $57,000. The price per unit is $6. The firm estimates an ordering cost of $3.00 per order, with an inventory carrying cost of $.50 per unit. What is the economic order quantity? (round to the nearest whole number) Select one: O a. 338 units b. 930 units O c. 239 units O d. 827 units