isi Question 28 of 34 ) Question 28 3 points Save uces flash drives for computers, which it sells for $20 each. Each flash drive costs 56 of variable costs to make. During April, 700 were sold. Fixed costs for April were $4 per unit for a total of $2,800 for the month. How much does Sutton's operating income increase for each $1,000 increase in revenue per month? a) $700 b) $50 c) $14,000 d) Not enough in Question 28 of 34 2i