The College Board reports that since 2000, college tuition and fees have increased by 160 percent while the share of family income required to pay for tuition at public four-year colleges has risen from 5 percent in 2000 to 14 percent in 2015. This is an example of condition.

Simon, aged 10, is invited to a classmate's birthday party at an exclusive ski resort on march 15th. the day will include 4 hours of snowboarding, lunch and birthday cake. simon's mother checks a box on the invitation that says "yes, we will attend" and returns it to the classmate's address. unfortunately, they later don't attend the party when simon comes down with the flu. on march 17th, simon's mother receives an invoice in the mail from simon's classmate for $35 that says, "party no-show fee." can simon's classmate collect the fee?