Bonita industries produces flash drives for computers, which it sells for $30 each. Each ash drive costs $7 of variable costs to make. During April, 1000 drives were sold. Fixed costs for April were $6000. How much does Bonita's operating income increase for each $2400 increase in revenue per month? 0 $1200. 0 Not enough information to determine the answer. 0 $1840. 0 $30000