Saleem bought 4 baskets with the average cost of $4. If Saleem also buys the fifth basket with the price of $ 8, what is the average (arithmetic mean) price of those 5 baskets?  Choose the correct choice from the following choices
A) $ 4.50 B) $ 6.00 C) $ 4.00 D) $ 5.50 E) $ 4.80

Rationale: 4 baskets - > total cost = 4 * avg cost = 4 * 4 = 16 fifth basket cost = 8 total cost for 5 baskets = 16 + 8 = 24 am = 24 / 5 = 4.80 answer : e
Answer: E