Google Analytics Variables - use my own instead of Google's

The variables in my website's cart are different from those that Google specifies in their dataLayer example for transaction level tracking.  See below. Instead of transactionTotal I want to use totalPrice. I also do not want to be required to use all of those variables; this is purely so I can install this code in Google Tag Manager and track transactions in my analytics.
Randy ColeDigital Marketing, Marketing Director, Market Manager, IT DirectorAsked:
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Randy ColeDigital Marketing, Marketing Director, Market Manager, IT DirectorAuthor Commented:
Thanks leakim971, that does not specifically address the way I can do this with GTM. I will continue to look for solutions and will dig deeper in the article you linked to. At this time I cannot award points, but I can keep searching and will award once I find the solution.

For anyone else out there following this thread, Google Support led me to creating a macro for AdWords tracking and I will experiment with that as a solution for analytics tracking. However, my research is making me believe that I cannot customize variables in Analytics eCommerce tracking.
Randy ColeDigital Marketing, Marketing Director, Market Manager, IT DirectorAuthor Commented:
Leakim971 set me on the correct path. For others trying to do the same thing - create a macro in GTM and call the macro from the VALUE box of your Adwords Conversion tag. The macro I built was a constant string with a value if (<%= TotalPrice %>) {   var google_conversion_value = <%= TotalPrice %>;   }   (my variable is called TotalPrice).

This worked for me.
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