Final answer:
The list price applies to every gallon a distributor purchases from EM.
Step-by-step explanation:
The type of pricing adjustment that applies to every gallon a distributor purchases from EM is the list price. In this case, the distributor pays a predetermined price per gallon for every gallon they purchase, regardless of the quantity purchased.
For example, if the list price is $1.00 per gallon, and the distributor purchases 100 gallons, they would pay a total of $100.
It's important to note that the list price may vary depending on the quantity of gallons purchased and other factors, but in this scenario, it remains constant for every gallon.