Chips at poker table

Depends on the guarantee and how many players you have. Total tables won't matter if you get more buyins than physical seats. Tournament will probably end in some way when the blinds equal 10% of the total amount of chips in play. If blinds max out at a total of 750k, then total chips on all the tables will need to be at least 7,500k.

Then look at the groupings of the chips. Many chips might not be on the table at certain times. Tournament will end with 100k and 25k chips only on the tables so you'd need 60 of each but I'd go up to 80 of each to cover reentries/rebuys. Then you have to look at starting stacks and multiply the chip count by the total players. You're probably giving every player 10x 100, 4x 500, 7x 1000, and 8x 5000. Additional players or reentry/rebuys can be given 10 5k chips.

All this gave me the following numbers:

1,000x 100
400x 500
700x 1000
900x 5000
80x 25k
80x 100k