What does 18yd DR and 55yds ROT mean in regards to bolts of fabric?

In the context of bolts of fabric, "18yd DR" typically means that the bolt contains 18 yards of fabric in a "discontinued run" or similar designation, indicating it may be a limited or special offering. "55yds ROT" indicates that there are 55 yards of fabric in a "regular order type," suggesting it is a standard, available fabric. These designations help retailers and manufacturers manage inventory and communicate fabric availability to customers.