A and B start a business jointly. A invests Rs.16000 for 8 months and B remains in the business for 4 months. Out of the total profit B claims 2/7th share. How much money is contributed by B?  Choose the correct option:
A) Rs.12829  B) Rs.12800  C) Rs.12293  D) Rs.12804  E) Rs.12830
16*8: x*4 = 5:2   x = 12.8 =&gt;   Rs.12800   Answer: Rs.12800
<result>B</result>
A and B start a business jointly. A invests Rs.16000 for 8 months and B remains in the business for 4 months. Out of the total profit B claims 2/7th share. How much money is contributed by B?