Respuesta :
Given-
12 questions per person,
300 people
There two thing given in question fixed and variables cost-
Fixed cost is= $ 500
Variable cost is-
$3 per question= $ 3 *12 *300=$10800,
$1.25 per person surveyed= $1.25 * 300=$375,
Total cost will be= $500+$10800+$375=$11675.