Hi there
In the debt side of trading account there are
Beginning inventory 55000
Add Purchase 45000
Total=100000
In the credit side there are
Sales 95000
Ending inventory
100000-80000=20000
Total=115,000
The difference between the debt side and the credit side is the gross p/l
And since the amount of credit side is bigger than the amount of the debt side it's gross profit
Gross profit=
115,000−100,000=15,000...answer
Good luck!