Opening stock-20000,cash sales-60000,credit sales-40000,purchases - 70000
Rate of gross profit on cost 33 1/3%
Hi Palak
Let cost be x
Profit =33.33% of x=0.33x=x/3
Cost+Profit=Sales
x+X/3=Sales
4x/3=Sales
4x/3=40000+60000
4x/3=100000
x=100000*3/4
x=75000
Cost=75000
Opening stock+purchase-cl stock=75000
20000+70000-cl stock=75000
cl stock=20000+70000-75000=15000