Answer: $5,500 (Increase)
Explanation:
Given that,
Performed services = $2,000 on account
Received cash on account = $8,000
Paid for repair expense = $700
Payment to a supplier that it owed from the previous month = $1,800
Cash paid = Paid for repair expense + Payment to a supplier
= $700 + $1,800
= $2,500
Effect = Received cash - Paid cash
= $8,000 - $2,500
= $5,500 (Increase)