Searls Corporation, a merchandising company, reported the following results for July:

Number of units sold 2,700 units
Selling price per unit $664 per unit
Unit cost of goods sold $405 per unit
Variable selling expense per unit $48 per unit
Total fixed selling expense $56,500
Variable administrative expense per unit $13 per unit
Total fixed administrative expense $118,200

Cost of goods sold is a variable cost in this company.

The contribution margin for July is:

A) $699,300

B) $1,453,400

C) $534,600

D) $359,900

Aproduction line has three machines a, b, and c, with reliabilities of .96, .86, and .85, respectively. the machines are arranged so that if one breaks down, the others must shut down. engineers are weighing two alternative designs for increasing the line’s reliability. plan 1 involves adding an identical backup line, and plan 2 involves providing a backup for each machine. in either case, three machines (a, b, and c) would be used with reliabilities equal to the original three. a. compute overall system reliability under plan 1. (round your intermediate calculations and final answer to 4 decimal places.) reliability b. compute overall system reliability under plan 2. (round your intermediate calculations and final answer to 4 decimal places.) reliability c. which plan will provide the higher reliability? plan2plan1