Johnson Company manufactures a variety of shoes, and has received a special one$-$time$-$only order directly from a wholesaler. Johnson has sufficient idle capacity to accept the special order to manufacture $15,000$ pairs of sneakers at a price of $$7\mathrm{.}50$ per pair. Johnson's normal selling price is $$11\mathrm{.}50$ per pair of sneakers. Variable manufacturing costs are $$5\mathrm{.}00$ per pair and fixed manufacturing costs are $$3\mathrm{.}00$ a pair. Johnson's variable selling expense for its normal line of sneakers is $$1\mathrm{.}00$ per pair. What would the effect on Johnson's operating income be if the company accepted the special order?

Select one:

a$.$ Increase by $$22,500$

b$.$ Decrease by $$60,000$

c$.$ Increase by $$52,500$

d$.$ Increase by $$37,500$