Perfect clean, inc. provides housekeeping services. the following financial data have been provided.

service revenue

$80,000

cleaning supplies used

22,000

wages expense

19,350

office rent expense

5,150

depreciation expense—machinery

550

calculate the contribution margin and the contribution margin ratio. (round your contribution margin to the nearest dollar, and your contribution margin ratio to two decimal places.)

a) $38,650; 48.31% b) $74,850; 93.56%

c) $60,650; 75.81% d) $32,950; 41.19%

A) $38,650; 48.31%

Explanation:

The computation of the contribution margin and the contribution margin ratio is shown below:

Contribution margin = Service Revenue - Cleaning Supplies Used - wages expense

= $80,000 - $22,000 - $19,350

= $38,650

The variable cost is Cleaning Supplies Used + wages expense

And, the contribution margin ratio equals to

= (Contribution margin ÷ sales) × 100

= ($38,650 ÷ $80,000)  × 100

= 48.31%

answer; (d) i believe that the correct answer is ; /// a new invention lowers the cost of production;

the correct answer would be b, when, queen, calder hall and london.

explanation:

we always capitalize words when a paragraph or sentence is starting, when an important name is used, when a place is being written, or simply when a noun is used, etc. so in this sentence, sentence is starting from 'when', so it will be written in capital letters. secondly, queen is considered to be an important person, so it will also be written in capital letter. next, the name of the town is mentioned, i-e calder hall, which will also be written in capital letters. in the last,   city name is being used, 'london', which will also be written in capital letters. so option b is the most appropriate one.