What is 10(n-6)when n=14

Answer this question only if you know the 30 points and

Agreeting card company can produce a box of cards for $7.50. if the initial investment by the company was $50,000, how many boxes of cards must be produced before the average cost per box falls to $10.50?

Ben is three times as old as samantha, who is two years older than half of michel's age. if michel is 12. how old is ben?