(8) LINQ with a DB

A program which takes in user inputs, validates them, and then stores
them in a corresponding database. Then checks to confirm the data was
committed.

The database (myDB) has one table called Sales with four columns:
1. SalesID (the identity/primary key of the table, int)
2. SalesAmount (smallmoney)
3. SalesDate (smalldatetime)
4. TaxAmount (smallmoney)