CP - Cost price ; SP - Selling price ; MP - Marked price
Assume CP of 1gm=10Rs
Given, CP of 1200gm= SP of 1000gm
So, CP of 1200gm= SP of 1000gm=12000Rs
Hence, Profit <for say, 1000gm> = (SP-CP)/CP ×100=(12000−10000)/10000×100=20
Now again marked up by 10
SO, Profit % =20+10+(20×10)100=32