Using POSper/Developer guide/Stable/Database-Miscellaneous Details
The two tables that store the sales are:
TICKETS (TICKETID, DATENEW, HOST, PERSON, PAYMENT, MONEY INTEGER)
PRODUCTSOUT (TICKETID, TICKETLINE, PRODUCT, UNITS, PRICE)
One sale is one record in the table TICKETS and one or more records in the table PRODUCTSOUT.