What would be the account balance in the Service Revenue account after the following transactions, assuming a zero beginning balance?
| $17,400 credit | |
| $14,400 credit | |
| $14,400 debit | |
| → | $15,900 credit |
 | $15,900 debit |
$4,200 + $3,500 + $2,200 + $6,000 = $15,900 credit normal balance
