Answer: $159.60
Explanation:
From Account Bal = $250. 65
Date Check number Dr Cr
Acc Bal 250.65
July 14 #346 21.95
July 16 #347 48.50
#348 75.60 104.60
July 18 55.00
Total 159.60
Marie's new balance will be calculated as amount spent from July 14th to 16th ($21.95 + $48.50 + $75.60) - account balance ($250.65) = $104.60, then we add the deposit of $55.00 credited on the July 18th, which makes a new balance of $159.60.
I hope this is clear.