White Grains Inc. has received a special one$-$time order for $15,000$ bird feeders at $$3$ per unit. White Grain currently produces and sells $75,000$ units at $$7\mathrm{.}00$ each. This level represents $80\%$ of its capacity. These bird feeders would be marketed under the wholesaler's name and would not affect Bluebird's sales through its normal channels. Production costs for these units are $$3\mathrm{.}50$ per unit, which includes $$2\mathrm{.}25$ variable cost and $$1\mathrm{.}25$ fixed cost. If White Grains accepts this additional business, the incremental revenue will be:

A$)$ $$45,000.$

B$)$ $$11,250.$

C$)$ $$38,750.$

D$)$ $$7,500.$