Answer: There is 49.28% of cumulative markup for the department at the end of April.
Step-by-step explanation:
Since we have given that
Price of opening inventory = $170,000
Mark up rate = 48%
Amount of mark up is given by

Price of additional merchandise = $80000
Mark up rate = 52%
Amount of mark up is given by

So, total mark up would be
$81600 + $41600 = 123200
So, the cumulative markup percentage for the department at the end of April is given by

Hence, there is 49.28% of cumulative markup for the department at the end of April.