Answer:
She had no money left. $ 0
Explanation:
It said she had come in with $15 dollars, right? (This is our total)
She had bought a muffin ($4)
A coffee ($3)
And a Sandwich ($8)
If we add up all the items that give us $15, then it says how much money did she walk away with? Well, if we subtract how much everything was from the total money we bring in:
15 - 15 =
That gives us:
15 - 15 = 0
Hope this helps <D