Sanborn Company has 10 employees, who earn a total of $1,800 in salaries each working day. They are paid on Monday for the five-day workweek ending on the previous Friday. Assume that year ended on December 31, which is a Wednesday, and all employees will be paid salaries for five full days on the following Monday. The adjusting entry needed on December 31 is: A) Debit Salaries Expense, $5,400; credit Salaries Payable, $5,400.
B) Debit Salaries Expense, $3,600; credit Salaries Payable, $3,600.
C) Debit Salaries Expense, $9,000; credit Salaries Payable, $9,000.
D) Debit Salaries Payable, $5,400; credit Salaries Expense, $5,400.
E) Debit Salaries Expense, $5,400; credit Cash, $5,400.

World systems manufactures an optical switch that it uses in its final product. world systems incurred the following manufacturing costs when it produced 74 comma 000 units last​ year: ​(click the icon to view the manufacturing​ costs.) another company has offered to sell world systems the switch for $ 13.50 per unit. the world systems prepared an outsourcing decision analysis to show the cost per unit of making the switches versus the cost per unit of buying​ (outsourcing) the switches. ​(click the icon to view the outsourcing decision​ analysis.) world systems needs 86 comma 000 optical switches next year​ (assume same relevant​ range). by outsourcing​ them, world systems can use its idle facilities to manufacture another product that will contribute $ 140 comma 000 to operating​ income, but none of the fixed costs will be avoidable. should world systems make or buy the​ switches? show your analysis.