Diamond Company has three product lines, A, B, and C. The following financial information is available: Item Product Line A Product Line B Product Line C
Sales $30,000 $45,000 $12,000
Variable costs $18,000 $24,000 $7,500
Contribution margin $12,000 $21,000 $4,500
Fixed costs:
Avoidable $4,500 $9,000 $3,000
Unavoidable $3,000 $4,500 $2,000
Operating income $4,500 $7,500 ($500)
Assuming that Product Line C is discontinued and the manufacturing space formerly devoted to this line is rented for $6,000 per year, operating income for the company will likely:.
a. Increase by $7,200.
b. Increase by $3,300.
c. Increase by some other amount.
d. Be unchanged—the two effects cancel each other out.
e. Increase by $4,500.

Costco wholesale corporation operates membership warehouses selling food, appliances, consumer electronics, apparel and other household goods at 471 locations across the u.s. as well as in canada, mexico and puerto rico. as of its fiscal year-end 2005, costco had approximately 21.2 million members. selected fiscal-year information from the company's balance sheets follows. ($ millions). selected balance sheet data 2005 2004 merchandise inventories $4,015 $3,644 deferred membership income (liability) 501 454 (a) during fiscal 2005, costco collected $1,120 cash for membership fees. use the financial statement effectstemplate to record the cash collected for membership fees. (b) in 2005, costco recorded $46,347 million in merchandise costs (that is, cost of goods sold). record thistransaction in the financial statement effects template. (c) determine the value of merchandise that costco purchased during fiscal-year 2005. use the financial statementeffects template to record these merchandise purchases. assume all of costco's purchases are on credit.