An income statement for Sam's Bookstore for the first quarter of the year is presented below: Sam's Bookstore Income Statement For Quarter Ended March 31 Sales $ 900,000 Cost of goods sold 630,000 Gross margin 270,000 Selling and administrative expenses Selling$ 100,000 Administrative104,000204,000 Net operating income $ 66,000 On average, a book sells for $50. Variable selling expenses are $5 per book with the remaining selling expenses being fixed. The variable administrative expenses are 4% of sales with the remainder being fixed. The contribution margin for Sam's Bookstore for the first quarter is g

The contribution margin for Sam's Bookstore for the first quarter is 0.84 or 84 %

Explanation:

Contribution Margin = Contribution ÷ Sales

Where,

Contribution = Sales - Variable Costs

where,

Sales :

Sales = $ 900,000

Number of Books Sold = $ 900,000 ÷ $50

                                      = 18,000 books

Variable Costs Calculation :

Cost of goods sold                                                           $630,000

Variable selling expenses ($5 × 18,000 books)               $90,000

Variable administrative expenses( 4% × $ 900,000)       $36,000

Total Variable Costs                                                         $756,000

Therefore,

Contribution Margin =  $756,000÷  $ 900,000

                                  = 0.84 or 84 %