Determine the total cost for the following plan given the following forecasts:

Month

$1$

$2$

$3$

$4$

$5$

$6$

Forecast

$3$

$8$

$0$

$4$

$0$

$0$

$4$

$2$

$0$

$4$

$4$

$0$

$4$

$6$

$0$

$4$

$8$

$0$