2. Robert has three jobs. He worked at Young's Grocery and earned $5,805. He was a waiter at the A & B Restaurant and earned
$12,445. He also earned $56,002 working for CCD Communications. Each employer took out 6.2% for Social Security. How much did Robert pay in Social Security?
To evaluate this expression, all we have to do is substitute the given values of the variables into the expression. That is, replace every in the expression with a and every in the expression with a 5.