Cost of taking visit visa for Oman?

Sir I am planning to come Oman on a visit visa I don't have any relatives there in Oman and one of my friend working there in Oman told me that he will help me to get visit for me but I have to pay 200 Omr for that visa , but in Oman police website the visit visa charge written as 20 Omr, do you have any idea about it? If there is any other option for me to get a visit visa . Sir please reply

Well cost of the visa is 20 omr but he might be charging you extra as only relatives can apply through ther companies