Sales per month Jan: 12,400; Feb: 9,500; Mar: 14,300; Apr: 16,100; May: 15,200; Jun: 18,750 0 5,000 10,000 15,000 20,000 Jan Feb Mar Apr May Jun Jan: 12,400 Feb: 9,500 Mar: 14,300 Apr: 16,100 May: 15,200 Jun: 18,750