Question

A store bought an airplane poster and marked it up 100% from the

original cost of $5. Later on, Isabella purchased the airplane poster
and paid 10% sales tax. How much, including tax, did she pay for the
airplane poster?

Answer 1

She paid 11 dollars total

Explanation:

100% of $5 is $10

10% of $10 is $1

10 + 1 = 11