Need a custom calculation script that gives value to multiple fields to give total owed

[Adam28105861z6ov]

Hello, I'm in dire need of a custom calculation script that would provide a total

 

14 fields which would multiply the numbers entered in a field by a specific amount on the right. In the example below the only field that can be edited is the count amount and total on the bottom right. I do not know anything about javascript lol so any help would be greatly appreciated. 

Example:

[try67]

What are the names of the fields involved?