Aare yaar somebody help me in this branch accounting ques pl

QUESTION IS

NEW TEXTILES LTD OPERATE A NUMBER ID RETAIL SHOPS TO WHICH GOODS ARE INVOICED AT WHOLESALE PRICE WHICH IS COST PLUS 20%, SHOPS SELL THE GOOD AT THE LIST PRICE WHICH IS WHOLESALE PRICE PLUS 10%. FROM THE FOLLOWING PARTICULARS ASCERTAIN P\L FOR 2002

a) Stock at shop on Jan 1  '2002                      RS 15000/-

b) Goods invoiced to shop during 2002          RS 140000/-

C) SALE AT SHOP                                                RS 154770/-

D) GOODS DESTROYED BY ACCIDENT(RETAIL VALUE)    RS 660

E) EXPENSES AT SHOP                                       RS 7200/-

NOW IF ANYBODY HAS THE BRAIN TO SOLVE THIS..KINDLY REPLY ASAP... 12TH KO EXAM HAI..KRIPYKA KARKE HELP KARE JALDI... 

ANS. IS GP 14070/- N NET PROFIT 6270/-

BUT SOLVE IT FOR ME..KAISE KARNA HAI..UNABLE TO GET THIS REQUIRED ANSWER... THANKS