#### Answer

112 boards
1480 linear ft

#### Work Step by Step

Add to find the total number of boards.
Multiply the number of boards of each length by the length to find the linear feet for that size board. Sum to find the total linear feet.
#boards$\ \ \ \ \ \ \ $linear ft
$\ \ \ \ \overset236\times20=\overset24\overset132$
$\ \ \ \ 28\times10=280$
$\ \ \ \ 36\times8\ \ =288$
$\underline{\ \ \ \ 12}\times16=\underline{192}$
$\ \ 112\ \ \ \ \ \ \ \ \ \ \ \ \ 1480$