The T - account for Cash had 3 transactions entered into it. It was increased by $400 and decreased by $100 and by $30, respectively. Its balance at the end of the period would be a (debit/credit) balance of $

Debit balance of $270

Explanation:

The cash account is an asset account hence a debit entry to it increases the account balance while a credit entry reduces it.

If the account balance was increased by $400 and reduced by $130 (i. e $100 + $30), the net balance in the account

= $400 - $130

= $270

This is a debit balance.