Final answer:
Andy should consider buying few cars from the manufacturer because of the high interest costs on his Line of Credit.
Step-by-step explanation:
In this case, Andy should consider the trade-off between order cost and holding cost. The order cost is the fee charged by the manufacturer for each unit Andy buys, and the holding cost refers to the interest expenses on Andy's Line of Credit. Since interest rates have risen sharply and the interest costs are expensive, it would be more cost-effective for Andy to buy few cars from the manufacturer. This way, he can reduce his inventory and lower his holding cost.