Final answer:
Refrigerated food prepped onsite may be offered for sale in a vending machine for up to two hours.
Step-by-step explanation:
Refrigerated food prepped onsite may be offered for sale in a vending machine for up to two hours. According to food safety guidelines, perishable food left at a temperature between 4 and 60 degrees C (40 and 140 degrees F) for more than two hours should be thrown out to ensure food safety.