Purchase Price Accounting - PF Balance Sheet Help

Hi all, quick question if someone could guide me in the right direction.

Doing a 3 statement model + LBO, and at the stage of making pre and post transaction balance sheet for the transaction year.

I understand most of the entries, however, a bit confused what to do with the cash.

The company has a pre-existing cash balance, say $100M. This is a cash-free, debt-free transaction, so surely this initial cash balance must be wiped to 0. 

My question is, what / where is the corresponding debit entry to make the balance sheet balance? Right now I just tuck it under Shareholders Equity and it is balancing, not sure if that's the correct thing to do

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Edited: While on the topic, could someone give a clear distinction, in terms of practical modeling outcome, between a cash free/ debt free transaction vs. assuming existing debt / cash? 

Is the difference just in that, for the former, you pay an implied EV, which is used to take out the net debt? And in the latter, you only pay an implied equity, and you assume the existing debt and cash?

Thanks