Answer: 550N + 650
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Work Shown:
N = number of months
A = amount Charmaine saves = 155N+650
B = amount husband saves = 395N
T = total amount saved from both people combined
T = A+B
T = (155N+650)+(395N)
T = (155N+395N) + 650
T = 550N + 650
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Example:
Let's say they saved for N = 10 months.
A = 155N+650 = 155*10+650 = 2200 dollars saved
B = 395N = 395*10 = 3950 dollars saved
A+B = 2200+3950 = 6150 dollars saved total
Or we could say
T = 550N+650 = 550*10+650 = 6150
as a slight shortcut.