The pie chart given below shows the production of 6 different factories. The total production of all these 6 factories is 12000. The production of a particular factory is shown as a percent of total production of all these 6 factories.

J1 = The value of average production of P and R.
J2 = The value of average production of Q and T.
What is the value of (J1 - J2)?

A

360

B

420

C

340

D

400