GST valuation

Deepak Deepu (59 Points)

22 July 2020  
supposed supplies supply UPS to his consumer
supplies supply new UPS & also taken back old UPS
for example new UPS 50000
old UPS 15000
gst charge on total value on = 65000 or 35000 if it's applicable gst on buy back UPS what rate applicable on those buy back UPS