Hi there
income from operations=
Sales-(fixed+variable) cost
So we need to variable cost
Variable cost=
Sales-Contribution margin
Contribution margin=
2,100,000×0.35
=735,000
Variable cost=2,100,000−735,000
=1,365,000
Income from operation
2,100,000−(400,000+1,365,000)
=335,000 ....Answer
Hope it helps