A business purchase goods on credit for $10000, half the goods purchased were sold for cash at a markup of 120%. sales commission of 5% was payable on this transaction. all takings were banked.

what was the net profit arising as a result of entering into these transactions?

A $5700

B $5450

C $4750

D $5200

i know the answer is B but i dont know how and how the cash = 11000 and sale 11000 they are saying purchases are of 10000 so if we dont know op inv and cl inv how we gonna find it out plz elaborate more on this thankyou