Due to a worldwide epidemic, a company's actual sales for the fiscal year ended up being much lower than what had been projected. As a result, the company's indirect cost rates for general and administrative expenses would:

A decrease in indirect cost rates would imply that the company is managing its expenses more effectively or that its production scale has increased, allowing fixed costs to be spread over more units. However, with lower sales, the opposite effect occurs, leading to higher per-unit indirect costs rather than a decrease.

While it is true that specific details about the company's cost structure and expenses are not provided, economic principles suggest that lower sales generally lead to higher indirect cost rates. Therefore, it is reasonable to conclude that the trend is likely to increase rather than remain undetermined.

For indirect cost rates to remain unchanged, the company's fixed costs would need to be absorbed by the same sales volume. However, with an actual sales drop, the unchanged indirect cost rates would not reflect the reality of the situation, as the cost per unit effectively increases due to fewer units sold.