Uber India — charged cash for a upi based payment ride

Address:

Kolkata, West Bengal, 700064

On 14 November 2018, I had book a ride for my freind from Rabindra Tirtha, Rajarhat to Prachi Cinema Sealdah. The ride was UPI based payment ride. On completion of the ride the Uber app on driver's phone showed a sum of rupees 139.84 to be paid in cash. So, my freind paid in cash as it was showing on the driver's phone. But, now my Uber app is showing a payment of rupees 119 to be made for the same ride. What is the meaning of this?