At Walmart, Mr. Smith buys 4 packs of pencils for $1.99 each and 2 packs of paper for $3.75 each. If he pays with a $20.00, how much change will he receive?

Rena used the steps below to evaluate the expression , when . step 1: substitute into the expression. step 2: simplify the parentheses. step 3: evaluate the power to a power. step 4: use reciprocals and find the value. in which step did rena make the first error?