If you are selling a contract item to an authorized user and there is no evidence of another contract vehicle in place, the order is considered a GSA sale.
Any one or more of the following may indicate that a sale is a MAS sale:

MAS contractors are required to report contract sales monthly under the Transactional Data Reporting (TDR) program and quarterly under the traditional Schedule program. Contractors under the TDR program have the option to pay any associated Industrial Funding Fee (IFF) on a monthly basis, but all contractors are required to pay any associated IFF on a quarterly basis. Contract sales must be identified and separated from non-contract sales, both government and non-government. The following sections explain in detail how to determine what is and is not a reportable sale.
 

Analyzing your company's sales is an important way to understand how your business is doing in the market and identify any strategic changes you want to make. The below links provide access to sales data.