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The contribution approach essentially attempts to provide a measure of the
decrease in immediate net income that would result from rejecting an order. This
is the contribution margin forgone. Traditional approaches to pricing do not
supply such a number. In part (1), the £470 tells Smythe that she is investing
£470 now to uphold her pricing policies. She can then assess whether preserving
such policies and the long-run pricing structure is worth an investment of such
magnitude. She also may assess whether accepting marginal business will cause
this customer to seek such concessions regularly. Alternatively, Smythe may
want to make such concessions occasionally to attract new customers.
A possible contribution margin formula may be illustrated as follows:
Direct material £ 5,300
Direct labor 6,200
Variable overhead at 65% of direct labor 4,030
Total variable cost £15,530
Markup at 48.1%* of £15,530 7,470
Target selling price £23,000
*Normal markup percentage = (£23,000 – £15,530) ÷ £15,530 = 48.1%.
Note that the markup of 48.1% is much higher than the 10% used previously
because the markup must provide for the recovery of fixed overhead as well as
the making of net income. The key to the contribution approach is its intelligent
use with full recognition that total variable cost is not total cost.