applying a formula to the data from google forms

I have a google spreadsheet which is connected to a google forms

I wanted one formula to be automatically copied to the new lines(Column R) when google form response is submitted

the spread sheet: https://docs.google.com/spreadsheets/d/1Z7uUBnzS5zKnxGswKKNAgn2XbRunqIzQZMATDl7skoE/edit#gid=1300745141

the formula: if($O6="UZS",index(googlefinance("currency:UZSUSD","price",$B6),2,2)**$P6,if($O6="EUR",index(googlefinance("currency:EURUSD","price",$B6),2,2)*$P6,$P6)))