FORM C under CST Act

Dear Sir,

Please clarify the below doubt:-

Dealer K (In kolkata) purchases goods from dealer C (In chennai) at CST 2% against Form C as under:-

Goods Value 10,000 (On 01.07.2008)

Add: CST 2% 200

TOTAL 10,200

1) Due to delay in despatch K had to bring the goods from C by air at Rs. 1100 freight. This freight is debited to C by K.

2) Due to bad quality K returns goods worth Rs. 2500 + CST 2% to C

WHAT WILL BE THE AMOUNT FOR WHICH K SHALL ISSUE FORM C to dealer C in Chennai