Non-obvious goal definition

As becomes fairly obvious, when a goal requires a number of products--eggs, dried egg packets, whatever--you need to produce that many during the level. You don't need to have them on hand. Which makes sense; you couldn't store them all!

And similarly, I discovered from reading the walkthrough on this forum, you can reach the required number of gold coins at any time during the level. You do NOT have to end with that number as I assumed. Makes quite a difference to your strategy, no?

Incidentally, if you go back to a level that you've won a gold on and don't go fast enough to win it again, the gold is replaced with the silver icon.