The following are historical demand data:

YEAR SEASON ACTUAL

DEMAND

$2011$ Spring $204$

Summer $148$

Fall $380$

Winter $565$

$2012$ Spring $482$

Summer $265$

Fall $680$

Winter $966$

Use regression analysis on deseasonalized demand to forecast demand in summer $2013.($Do not round intermediate calculations. Round your answer to the nearest whole number.$)$