Eight friends went to a Dodger game. The price of admission per person was $x. Four of the friends paid an extra $6 each for a Dodge-Hot Dog. Write and simplify an expression that represents the total cost.

a. 4 (x + 6) + 4x and simplified: $4x + $12
b. 4 (x + 6) + 4x and simplified: $8x + $24
c. 4 (x + 6) and simplified: $4x + $24
d. 4 (x + 6) and simplified: $4x + $10