Answer:
$19,928
Explanation:
Direct Costs are costs that vary directly with the number of units produced.
Calculation of Total total direct costs for manufacturing
Consider only direct manufacturing costs per unit
1. Lumber - Oak         $7.50 Â
2. Concrete            $1.56 Â
3. Metal screws        $ 0.75 Â
4. Wood stain          $0.79
5. Direct labor         $10.60
Total                $21.20
Therefore,
Total Cost = Unit Cost x Units manufactured
         =  $21.20 x 940
         = $19,928
Conclusion
The total direct costs for manufacturing 940 high-grade benches is $19,928