There are 120 hens in a poultry. Due to the addition of 140 more hens, the expenses of the poultry increases by Rs. 4050 while the average expenditure per hen diminishes by Rs. 3. What was the original expenditure of the poultry?

A

Rs. 4780

B

Rs. 4140

C

Rs. 4540

D

Rs. 4350