Bob and Sally Have an Agreement Whereby Bob Is to Mow

Essay

Bob and Sally have an agreement whereby Bob is to mow Sally's yard for $900 for the year.Bob's mower breaks down,and he decides he no longer wants to mow.Instead,he wants to paint.Bob talks to Sally who is not happy about the mowing issue.She tells Bob that it would cost her $1,000 to get the other lawn service in the community to do the mowing for the year.Bob offers to paint Sally's house to settle the dispute.Sally agrees.Bob never shows up to paint.Sally gets someone else to paint the house for $800 and sues Bob for not mowing her yard.Can Sally do so,or is Bob entitled to get the lawsuit involving mowing dismissed because if he breached any contract,it involved painting?