A rectangular ground 90m long and 42 m wide has two cross roads in its centre. The road parallel to the length is 7 m wide and the other road is 3 m wide, both roads are perpendicular to each other. The cost of laying the bricks at the rate of Rs.25 per m$$^2$$, on the roads, will be:

A

Rs.18,308

B

Rs.18,375

C

Rs.16,375

D

Rs.18,575