Angela Co$.$ sells customized shoes. Currently, it sells $10,000$ pairs of shoes annually at an average price of $$46$ a pair. It is considering adding a lower$-$priced line of shoes which sell for $$38$ a pair. The company estimates it can sell $4,000$ pairs of the lowerpriced shoes but will sell $1800$ less pairs of the higher$-$priced shoes by doing so$.$ What is the amount of the sales that should be used when evaluating the addition of the lower$-$priced shoes?

$$69,200$

$$74,000$

$$38,400$

$$39,000$

$$65,000$