Lab 5: A sequence of purchases

The input consists of a series (at least one) of purchases. 
Each purchase is on a new line. After the last purchase 
there may, or may not be a new line. A purchase consists of
the name of the purchase, followed by slash, followed by the 
amount of the purchase. Create a parser. Example input:

Movie tickets/$19.95
Cellphone/$99.00
Mini tractor/$6900

You are to discard the separator symbols as well as the newline symbols.

Name the start rule: purchases