Can we pay KCET fees online ? How to pay ?

My son applied for Gneral candidate for KCET 2019, In the reservation page selected general merit as without selecting any category the form was not getting to the next page. Now when we went to pay through online it is asking for 500 Rs. Now we had doubt if there is something wrong we have done , as for general can dite it is 650 rs. can you let us know

After successfully uploading photograph and digital copies of signature and thumb impression, candidates have to pay the KCET application form fee, which can only be paid through offline mode (Through E-challan or DD). Find the fee details from the details below.

KCET 2018 Application Fee Details

Bank Challan - Candidates have to download the bank challan after selecting their bank. Candidates have to pay KCET 2018 application fee at branches of State Bank of India and ICICI Bank or e-Post Offices.

The final stage of KCET 2018 Application form filling is submission and taking the printout of the application form. After they have verified and carefully checked all the information and paid the fee, the candidates have to submit it online. However, after the final submission, the candidates have to download the application form and get it attested by Principal of the class 12th or PU of the institute/school/college studied or where the candidate is currently studying or by any Gazetted Officer.

Caution: Downloading and getting the download application form of KCET 2018 attested is mandatory for all candidates. The candidature of any candidate who does not do this will be cancelled. Candidates must keep 2-3 copies of the downloaded CET application with them, while the original attested copy (from Principal/any Gazetted Officer) should be produced and submitted at the time of counselling along with other documents for verification.