To determine the quantity to get a pawn, if the quantity is too small, it will make the item quantity in the market with more demand for intervention would (make a depressed agricultural products, such as original).
The amount to be pledged. If the amount is too small It will supply the market with a demand not to interfere too much (making commodities also depressed as before).
Determining the volume to pawn, if the volume is too low. It will make the products on the market is too much not to intervene the demand (make agricultural products also falls) as the original).