Sunlight Design Corporation sells glass vases at a wholesale price of $3.50 per unit. The variable cost to manufacture is $1.75 per unit. The monthly fixed costs are $8,500. Its current sales are 27,000 units per month. If the company wants to increase its operating income by 30%, how many additional units must it sell? (Round any intermediate calculations to two decimal places and your final answer up to the nearest whole unit.) A. 8,500 glass vases B. 33,643 glass vases C. 94,500 glass vases D. 6,643 glass vases