Explanation:
The preparation of income statement for January is shown below:-
Particulars               Computation       Amount
Sales                   1,500 × $2,320     $3,480,000
Less: Cost of Goods sold   1,500 × $1,420      $2,130,000
Gross Profit                               $1,350,000
Less: Operating expenses
Variable portion           1,500 × $1.40       $2,100
Fixed operating expenses                    $7,600
Operating income                           $1,340,300
Less: Interest expense                       $3,300
Income tax expense ($1,340,300 - $3,300) × 40%  $534,800
Net income                                 $802,200