Answer:
Explanation:
Amount paid by Joanne before promotion = 74 + 59 + 69 = $ 202
a) Amount saved if she switches to "3 for 129 plan" = 202 - 129 = $ 73
Percentage of saving =
= 36.13 = 36%
b) Amount saved after the first year = 202 - 139 = $ 63
Percentage of saving =
= 31.18 = 31%