Q The controller of Tome Industries has collected the following monthly operating data, the selling price, the variable cost per unit, fixed cost per month and income tax ratio did not change

	May	June	July
Sales revenue $	1,800,000	2,400,000	2,500,000
Total variable cost
Contribution margin$
Fixed cost
Income tax expense		180,000
Margin of safety ratio
Net of tax profit$	280,000	420,000

Instructions

Determine missing amounts in schedule.