Roz has a contract to submit ten cartoons a month to The New Yorker magazine.

In return, she receives $2,500. There is no guarantee that any cartoon will be used in the magazine, but for each cartoon published, she receives an additional $2,500. Her contract states that the ten cartoons are due by the 15^th of the month and that failure to deliver all the cartoons for the month by that date is a “material breach” of the contract for which Roz will pay The New Yorker $3,000. April has been a very unfunny month, and by the 15^th Roz only has nine cartoons to deliver. On April 17 she delivers the tenth. Has Roz substantially performed? Has she committed a material breach of her contract? What damages does she owe the New Yorker, if any? What if none of the cartoons from the April submissions were printed? What if the one submitted April 17 were printed?