Answer:
credit balance of $2,500.
Explanation:
Martinville, Inc. has earned revenue if $10,000. This will be reflected on credit side when journal entry is made and cash or accounts receivable are debited as per transaction. The company has now incurred expense of $7,500. These expenses are deducted from revenue amount to identify operating income of the company. The balance in the income summary will be reported. Income summary is a temporary account where all revenue and expense are accounted to identify net loss or gain during a certain period.
The calculation will be as follows,
$10,000 - $7,500 = $2,500.