Answer:
1) YoSan Inc.
Income Statement
For the month ended July 31, 202x
Sales revenue               $2,150,000
- Cost of goods sold          $1,520,000
Gross profit                  $630,000
- S & A expenses             $300,000
Operating profit              $330,000
2) YoSan Inc.
Income Statement
For the month ended July 31, 202x
Sales revenue                           $2,150,000
- Variable costs:
Contribution margin                       $700,000
- Period costs:
Operating profit                          $316,000
3) When you prepare a variable costing income statement, the ending inventory of finished goods and WIP only includes variables costs. All fixed or period expenses are included during the period that they occur and are not carried over to the next period. I.e. the ending inventory (400 units) for next month will be lower under variable costing.