Why does advanced pricing return a price on a sales order for a small quantity but returns "No Base

When I enter a sales order detail line in either feet or pounds for a relatively low quantity, the system returns the expected unit price based on the advanced pricing schedule.

However, when the quantity, in either feet or pounds, is above some threshold number, then the system returns the warning "No Base Price in Effect".

For example, when the order quantity is 7,000 feet, the system returns the unit price. When the order quantity is 8,000 feet, the system returns the warning.

For example, when the order quantity is 900 pounds, the system returns the unit price. When the order quantity is 1,000 pounds, then the system returns the warning.