Allegheny College will allow multiple payment plan agreements per student per term. Nelnet refers to this as Parallel Agreements.Select a payment plan. â—¦ Plans that have down payments will have an additional column with the amount due. A master service agreement (MSA) is a fundamental contract outlining the scope of the relationship between two parties. Learn about forming and registering your business online, and how to complete other types of business filings. Register your business (opens in a new tab). Agreement or any other document in the form attached to this DS Supplier Master. This Master Sales Agreement (the "Agreement") is entered into between the buyer listed on the applicable Purchase Order ("Buyer") and Calimetrix, LLC. Following divisions: (a).