Question

Logan, a sales clerk in a book store, earns a base salary of $1,700 per month plus a commission of 5 percent on monthly sales over $600. If Logan received $2,100 for the month of July, how much were his monthly sales?

Answer 1

1,700+.05(X-600)=2,100
-1700. -1700
.05(X-600)= 400
.05x-30 =400
+30=+30

.05x=. 430
Divided by .05
X=. 8,600