<http://webisa.webdatacommons.org/prov/53963136>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/115841999> .
<http://webisa.webdatacommons.org/prov/54366044>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/115841999> .
<http://webisa.webdatacommons.org/115841999>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/115841999>	<http://www.w3.org/ns/prov#value>	"It shoud calculate the amount due.Use a messagebox.show method to display a message when the user enters a 0 or a negative number as the number of units. also use the messagebox.show to display a message when the user enters a letter other than W or R. im a total beginner.. struggling" .
<http://webisa.webdatacommons.org/115841999>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<dreamincode.net> .