The bank where Hilary maintains her checking account mistakenly deducted
$16 each month from her account for 8 months and $19 a month for the
next 5 months. The bank realized and corrected the error after 13 months.
How much money does the bank need to return Hilary’s account?
The bank owes Hilary $223. You can find the answer by multiplying $16 by 8, to find how much money the bank mistakenly charged Hilary for eight months. Then, multiply $19 by 5, to find how much money the bank mistakenly charged Hilary for 5 months. To find the total amount that the bank charged Hilary in the total 13 months, add the sums from both equations. $16*8 = $128. $19*5 = $95. $128 + $95 = $223.