Write a real world situation that could be modeled by the equation 650 + 10m = 60m + 400

My savings served to bought 10 candies on the store and left 650, or also could have served to buy 60 candies and had left 400. What is the price of the candies m ?
650 + 10m = 60m + 400
To know the price of the candies, we had to get the value of m:
60m - 10m = 650 - 400
50m = 250
m = 250/50
m = 5
so the price of the candies is 5, and the savings is equal to each side of the first equation:
savings = 650 + 10m = 650 + 10(5) = 650 + 50 = 700 
savings = 60m + 400 = 60(5) + 400 = 300 + 400 = 700
then the savings are 700

The answer to this question is c