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Use the following data for problems 18-20. Crusty's Pizza Company is expanding its the Frozen Pizza business. They are adding additional grocery stores in Sioux Falls, Sioux City, Brookings and Watertown. Crusty's will supply these four stores from three pizzerias. Production, Demand and shipping costs (per pizza) are summarized in the tables below. Unfortunately, a problem has occurred at Pizzeria number 3 and its production capacity has dropped to only 200 pizzas. Crusty's management has recognized that they do not have sufficient production to meet the demand and has specified the following goals in priority order. At least 200 pizza's must be delivered to every grocery store (but do not exceed the store's demand) Management has budgeted shipping costs of $300 and would like to minimize any costs above $300. All the production capacity must be used Pizzeria Production (per Grocery Store Demand week Sioux Falls (SF) 1250 800 Sioux City (SC 900 750 Brookings (B) 400 200 Watertown (W) 550 To (all costs are in dollars) From Pizzeria SF SC B W 0.15 0.24 0.25 0.35 IN 0.30 0.15 0.24 0.75 0.10 0.45 0.10 0.25 18) What is the expected shipping cost? a. $300.00 b. $425.25 c. $690.50 . $254.00 19) How many pizzas are delivered to Watertown? a. b. 650 C. d. none 20) How many variables does this problem have? a. 12 b. 4 c. 3 d. 15