The answer to the blank space is decreases the amount that she spends on orange juice. Because the raw material that is used for her orange juice will be priced at a higher rate due to the frost that destroys the Florida orange crop, Sue should decrease the amount of product that she spends on orange juice because the orange juice would be more expensive.
This is due to her orange juice's price elasticity, which means that the product would change price and thus she as a customer can choose to buy less products if the price increases.