Here's a tip. For the gold customers, give them plain cheese instant pizza. And cut it up however you want it. You will lose all stars on that gold customer, but you won't degrade the customer or anything. This way you can get rid of gold customers and focus your time as well as SAVE A LOT OF TIME by only working with the non-gold customers.
Upvote this to help people finish this game quickly.
The game was kind of confusing from time to time... Maybe because in a long time i haven't played the last chapter, so I kind of forgot it. But I remembered that I loved the storyline, and this was the first game I tried my best not to use walkthroughs, so that I could enjoy the game more. Good job and hope your next game'll be out soon!