Failure to pay a supplier could be grounds for suspension if the licensee owes more than __________.

The correct answer is based on the threshold established for financial obligations that could impact a licensee's standing. In this case, if a licensee owes more than $750 to a supplier, this amount is significant enough to be considered grounds for suspension of their license. This rule aims to ensure that licensees maintain financial responsibility and are accountable in their business dealings, which helps to protect suppliers and the integrity of the industry overall.

The other options fall below this threshold, meaning that a debt lower than $750 would not automatically trigger suspension. This reflects the regulation's emphasis on higher financial accountability in professional conduct within the industry.