Question 1012840
she earned 21000.


18000 of it was her salary.


that leaves 3000 commission.


3000/.12 = 25000.


she made sales of 25000.


the formula for her pay would be pay = 18000 + .12 * sales


if sales is 25000, then formula for pay becomes:


pay = 18000 + .12 * 25000


simplify to get:


pay = 18000 + 3000 


combine like terms to get:


pay = 21000