How do you create a comma separated list from checkboxes?

[Xmarks]

Hello All,

I'm trying to create a formula that will create a comma-separated list of headers from checked checkboxes.

As you can see below when I check one of these boxes I would like it to automatically populate the Achievement Rollup Field with the heading of that field and any others I check.

[pressGO_design]

REGEX_REPLACE(

CONCATENATE(

IF({A}, "A, "),

IF({B}, "B, "),

IF({C}, "C, ")

),

", $",

""

)

but substitute your field names for A, B, C

Also crediting @kuovonne because this is a formula she shared a while back.