Easton bought eighteen 49-cent stamps for first-class letters and a book of twenty 34-cent stamps for postcards. So far, he has used [i]f[/i] 49-cent stamps and [i]p[/i] 34-cent stamps. Write a simplified expression for the total value in cents of all the stamps Easton has left.

[list=1][br][*]Write an expression with parentheses that represents the value of all the stamps Easton has left.[br][*]Distribute as needed.[br][*]Combine like terms.[br][/list][br][br]This applet is provided by Walch Education as supplemental material for their mathematics programs. Visit [url="http://www.walch.com"]www.walch.com[/url] for more information on their resources.