A Ball Park Figure means an approximate amount, or a rough guess. Use this idiom when you don't know exactly, but have a general idea.

Peter: How much do you think the vacation will cost?
Susan: Well, I'm not sure, but just as a ball park, I'd say about two thousand.

Brian: Can you give me a ball park on how much to fix my car?
Mechanic: Sure. We have to fix the brakes and there might be some extra parts, so I would say about $500 as a ballpark.

Sally: What's a ballpark on a new computer?
Salesman: Probably $2000.00.

Now try some examples yourself:

1) Man: How much for this carpet in my basement?
Salesman: _________________________________________________?

2) Wife: ______________________________________________________?
Husband: I would say $5,000 as a ballpark.

3) Wife: How much do we need to go to Mexico?
Husband: ____________________________________________________?

IN A NUTSHELL

If I may venture my opinion, when all is said and done, it would ill become me to suggest that I should come down like a ton of bricks, as large as life and twice as natural, and make a mountain out of a molehill on this issue.
From time immemorial, in point of fact, the object of the exercise, as sure as eggs are eggs, has been, first and foremost, to take the bull by the horns and spell it out loud and clear. At the end of the day, the point
of the exercise is to tell it like it is, lay it on the line, put it on the table – putting it in a nutshell, drop a bombshell and get down to the nitty-gritty, the bottom line. I think I can honestly say, without fear or favor, that I have left no stone unturned, kept my nose firmly to the grindstone, and stuck to my last, lock stock and barrel, hook
line and sinker. This is not to beat about the bush or upset the apple-cart, but to give the green light to the calm before the storm, to hit the nail on the head, to bite the bullet, and thus at the drop of a hat to snatch victory from the jaws of defeat.

That’s it.
Take it or leave it. On your own head be it. All good things must come to an end. I must love you and leave you. I kid you not. Don’t call us, we’ll cal you. And I don’t mean maybe.