Sroufe Manufacturing intends to increase capacity by overcoming a bottleneck operation by adding new equipment. Two vendors have presented proposals. The fixec costs are $$50,000$ for proposal A and $$80,000$ for proposal B$.$ The variable cost is $$14\mathrm{.}00$ for A and $$11\mathrm{.}00$ for $B.$ The revenue generated by each unit is $$22\mathrm{.}00.$

a$)$ The break$-$even point in units for the proposal by Vendor $A=6,250$ units $($round your response to the nearest whole number$).$

b$)$ The break$-$even point in units for the proposal by Vendor B $=$ units $($round your response to the nearest whole number$).$