Paying $25 fix my short Google Sheets Script

I have a list of all my stock trades with 3 columns of use, many duplicates of TICKER so that's why I want to use the "reduce" function which does work but only to reduce using TICKER and QUANTITY, can't figure out how to get my script to do PRICE also.

https://www.dropbox.com/s/3dj1glt2t...Dashboard - Google Sheets - Google C.jpg?dl=0

TICKER QUANTITY PRICE

GOOG------3-------------$200

my script here works great to reduce down the TICKER...

Paying $25 fix my short Google Sheets Script