Hiromi sells 12 T-shirts each week at a price of $13.00. Past sales have shown that for every $0.25 decrease in price, 4 more T-shirts are sold. Knowing that revenue is a product of price and quantity, Hiromi models his revenue by R(x) = (13 - 0.25x)(12 + 4x), where x represents the number of times there is a reduction in price.

Question: What is the maximum revenue Hiromi can generate each week? Show work.