Calculated field issue

Hi All,

I am new to Tableau and I want some help.

I have 7 products eg P1,P2..P7 and data has 2 types of prices in front of them Total1 and Total2.

My requirement is that I want to show sum of both prices product wise and Divide sum of Total2 by sum Total1 product wise.

Attached is the sample file.

Thanks