I can't say I've ever been to Popeye's, but $68 for 3 people seems unlikely based on their online prices: I picked a random one in Orlando, Florida and the "family meal" (which appears to be a very large amount of chicken) is $20.
The closest thing would be the "16Pc Classic Signature Chicken Family Meal," which is $55.69 at that location and is described as feeding between 6 and 8 people. So you'd need to tip a bit to get to $68 from there.
Did you include tax?
Also, that meal doesn’t include drinks. Poppies is significantly cheaper if you’re taking it home and supplementing with your own drinks.
If they’re bigger folks or starving and someone doesn’t want bone-in chicken, I could see it. 3 large 4 piece combos is $55.50 in Miami, and I think there are other things in that range (eg a 5 pc tender meal if someone hates bone-in chicken so they can’t get a family meal).
The family meals are substantially cheaper than individual meals, if you can get everyone to agree on bone-in chicken and the same 2 sides.
A 20% tip would push that up to something like $66.
This whole thread is like a Youtube epsiode of "Food Theory". https://www.youtube.com/@FoodTheory
My general assumption for any food I'm getting eating out in the US (across a range of regions) is $20/person for fast food/casual, and $30 if it's a basic restaurant. The food will be listed at $7-12 etc, but the receipt will show twice that due to fees, add-ons etc.
IMO what matters is what you pay; the numbers they post on the menus and other media aren't useful.