Final answer:
When Mr. Lupez and the workers' compensation company's payments are combined, they total $171.70. If the charges for Mr. Lupez's visit and immunization are equal to or less than this amount, his account now has a credit balance. Mr. Lupez has effectively overpaid, resulting in more credit in his account than the amount due.
Step-by-step explanation:
The question at hand involves an overpayment situation similar to the one Noel discovered, though on a much smaller scale. Mr. Lupez and the workers' compensation company have both made payments towards a charge, resulting in a situation that needs to be resolved. Mr. Lupez sent a check for $91.70, believing he was responsible for this amount, and the workers' compensation company also sent a payment, but in the amount of $80.00. These payments were both posted to Mr. Lupez's account towards the charges for an office visit and DTP immunization.
Combining both payments, the total amount paid would be $171.70. If the total charge for Mr. Lupez's visit and immunization equals or is less than $171.70, then the account has been overpaid, resulting in a credit balance. This means he has more credit in his account than what was owed, hence the correct answer here would be Option A) Credit balance.
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