Answer:
$320 
Explanation:
Given parameters: 
 Cost of attending the 2-year technical college = $3200; 
 His parents intend to give him half the cost; 
 Half the cost = 
 x $3200 = $1600 
The remaining cost = $3200 - $1600 = $1600 
Sam has 5yrs to work every summer;
 He must save: 
 = $320 every summer for the next five years to afford his first year tuition