Answer:
$225,400
Explanation:
The computation of total contribution margin under variable costing is shown below:-
Sales (4900 × $88)               $431,200
Less:Variable cost Â
Direct material (4900 ×  $12)        ($58,800) Â
Direct labor (4900 × 23)           ($112,700) Â
Variable manufacturing overhead
(4900 ×  2)                       ($9,800) Â
Variable selling and administrative
expenses (4900 × $5)             ($24,500) Â
Total variable expenses           ($205,800)
Contribution margin              $225,400
Therefore the total contribution margin under variable costing is $225,400