The following table gives the number of pints of type A blood used at Damascus Hospital in the past $6$ weeks:

$\backslash$table$[[$Week Of$,$Pints Used$],[$August $31,350],[$September $7,389],[$September $14,408],[$September $21,381],[$September $28,366],[$October $5,378]]$

a$)$ The forecasted demand for the week of October $12$ using a $3-$week moving average $=$ pints $($round your response to two decimal places$).$