The following estimated regression equation was developed relating average yearly income (y in $1000s) of 50 individuals with their age (x1) and their gender (x2) (0 if male and 1 if female) : 
= 35 + .7x1 + 3x2
Also provided are SST = 1400 and SSE = 400. The estimated income (in $) of a 40-year-old male is
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