it cost 27$
since its 3 more dollars then 4 times the amount of money she saved then
27-3=24
since its 4 times the amount of money you do 24/4 divide it by 4=6
then try it forwards do 6 x 4+3=27
then you do 27-6 cause she has 6 dollars
27-6=21
so she needs 21 more dollars to buy the blouse