RCM to be charged on the Transaction Value i.e. Rs. 8,500/-
Point 1 : As per the Provision of Section 15(1) of the CGST Act 2017, GST is levied on the "TRANSACTION VALUE."
Point 2 : As per the Provision of Section 15(2) clause (a) of the CGST Act 2017, Transaction Value includes any taxes, cess, duties etc which are charged under any law for the time being in force. Thus TCS, TDS, Basic Customs Duty, etc needs to be included in the Transaction Value.