Craig's family compared cell phone plans to get the best deal. At A-Mobile, the family plan is $39 for the

first two lines and $9 for each additional line. At B-Mobile, the family plan is $29 for the first two lines and $15

for each additional line. Craig's family needs to purchase 5 cell phone lines. Which family plan should

Craig's family go with? (Step by step ex. pls too)