Answer: Cash for $180
Explanation:
The Petty Cash balance should be at a certain level necessary to cover petty cash expenses of the company. In this case that amount is $200. $20 is already in cash in the account and so will need to be topped up to get to $200.
= 200 - 20
= $180
$180 will take the balance back to $200. The Cash account would be credited of this $200 and the Petty Cash would be debited.