The following table shows the number of pies consumed by the deans' suite during a monthly pie$-$eating contest.

Month

Forecast # Pies

Actual # Pies

January

$18$

$15$

February

$20$

$18$

March

$23$

$26$

April

$29$

$31$

May

$37$

$34$

June

$44$

$39$

July

$50$

$45$

What is the forecast tracking signal for June?

$-2\mathrm{.}67$

$0\mathrm{.}75$

$2\mathrm{.}67$

$-0\mathrm{.}75$