Thank you so much for the quick response and commentary guys. This place is awesome and I have so many more questions.
So, I inputted the code but unfortunately, I get the following error which displays in place of the button:
Warning
call_user_func_array() expects parameter 1 to be a valid callback, function 'updateCartText' not found or invalid function name in /nas/content/staging/ucco/wp-includes/plugin.php
Any ideas on how to fix. So, basically, the button with intially say Get Price, and when someone clicks it, it takes them to the shopping cart where there is a link to allow them to go back to the composite product order "wizard", which will then say "Update Your Package". So my main objective here is to take the proper wordpress protocol of not hacking core files and use a filter isolated in my child theme's functions.php file with this code. And I want to make sure that the quote form will not always say Get Cart, but will change to Update Your Package if they click on the link that goes back to the wizard to make changes which would then say "Update Your Package". So it works when I hack the code and just change the text from 'Update Price' to 'Get Price' , but doesn't work when I put the code suggested here in the functions file.