#### Answer

(a) $770~ft$ of fencing is required.
(b) $1224.30

#### Work Step by Step

(a) We can find the perimeter:
$P = (2)(245~ft)+(2)(140~ft)$
$P = 490~ft+280~ft$
$P = 770~ft$
$770~ft$ of fencing is required.
(b) We can find the cost:
$cost = (\$1.59/foot)(770~ft) = \$1224.30$