The data in the table below represent warehouse club and superstore sales in the eastern and central United States on a monthly basis. The data are in millions of dollars. $($c$3$p$12[$

$\backslash$table$[[$Date$,$Sales$],[$Jan$-02,2,580],[$Feb$-02,2,616],[$Mar$-02,2,838],[$Apr$-02,2,985],[$May$-02,3,258],[$Jun$-02,3,107],[$Jul$-02,3\mathrm{.}097]]$