Answer:
$35
Explanation:
The minimum transfer price is 35$ should be accepted by the food division. Minimum transfer price must be minimum and equal to variable cost only .However it can be greater than variable cost if division incurred some incrimental fixed cost. If company is not incurred any extra fixed cost then transfer price must be equal to variable cost.
Normal fixed cost is not considered for transfer price within the division of company. According to general rule transfer price within the same company by one division to another division should be equal to only variable cost or marginal cost. So answer is 35$ which is variable cost of food division.