Tons of cement produced and sold Sales revenue Variable manufacturing expense Fixed manufacturing expense Variable selling and administrative expense Fixed selling and administrative expense Net operating income 680,000 $ 2,788,000 $ 1,156,000 $ 760,000 $ 272,000 $ 294,000 $ 306,000 If the company increases its unit sales volume by 4% without increasing its fixed expenses, then total net operating income should be closest to: (Round your intermediate calculations to 2 decimal places.) Multiple Choice $12,240 O $318,240 $360,400 $311,973