Answer: A.This statement makes sense because Emily makes more money than Emma, so she has a greater cash flow at the end of the month.
Step-by-step explanation:
Emily has more monthly income and even if the duo spend exactly the same figure on everything they participate in, Emma will always come off short (negative monthly cash flow) because she does not earn as much as Emily does but spends equally.
There are a number of ways you can write the piecewise function. Here is one of them:

It could also be something like
p(t) = 7t + 3.50×max(0, t-40)
where the max(x,y) function returns the larger of x or y.
Spaghetti sauce - $2.49
Spaghetti noodles - $1.58
Gallon of milk - $3.17
$2.49 + $1.58 = $4.07
$4.07 + $3.17 = $7.24
Answer - $7.24
Hope this Helps!!