Help needed, please: How to create a summary slide that summarizes a list of selected options using checkboxes

I have a vast number (100+) of checkboxes (e.g. a checkbox called/with text "Pink", a checkbox called/with text "Yellow", etc.). I also have text variables named "Pink", "Yellow", etc. When checked/clicked, text variable "Pink"'s value changes to Pink, the text variable "Yellow"s value changes to Yellow, etc.  (e.g. Set VariablePink equal to the value of Pink, Set VariableYellow equal to the value of Yellow, etc.).  All of the aforementioned is easy to do.

The users can click any 15  of the 100+ checkboxes.

On another slide, I want to display to the users what 15 options/choices they selected. For this, I want to use Variables called Choice1, Choice2, up to Choice 15. How do I do this? I cannot figure out how to set triggers that include IF statements for each of the checkboxes. Help and advice will be appreciated.