Markland Manufacturing intends to increase capacity by overcoming a bottleneck operation by adding new equipment. Two vendors have presented proposals. The fixed costs are $50,000 for proposal A and $70,000 for proposal B. The variable cost is $12.00 for A and $10.00 for B. The revenue generated by each unit is $20.00. Vendor A and Vendor B have the same cost when the output volume - units (round your response to the nearest whole number)