Have dealt with fabric on a very limited non/QS situation, and MU was more than 100 percent, Imagine dealing with the mills are like other wholesale buisness, if you buy X amount it's this price, if you buy XXXX amount the cost drops.
Keep in mind price are only a small part of picture, overhead, insurance, interest, wages, all add into makeing anything profitable.
Too bad LQS can't co-op with others to increase their buys, and get the price down. Say 10 or 15 stores, making less frequent buys, to make the orders bigger thus helping get a better price break.
Know of some other buisnesses did this and purchased from the manufacturers then did their own distribution helped a lot to increase margin.
Can figure the longer it sits on the shelf the more expensive it gets if adding on the cost of interest each month.
Isn't this more than you wanted to know LOL :)