A monopolistic manufacturer of puzzles has collected consumer data and has discovered that the 16th consumer's willingness to pay for a puzzle is $28, while the 17th consumer's willingness to pay is $26.75. Suppose the firm is initially selling 16 puzzles and decides to increase output to 17 puzzles. . Your answer should include only numbers and a decimal (if applicable). Do not include the $-sign. . If your answer is not an integer, round it to the nearest cent (two decimal places). . If your answer is an integer, do not add the ".00" at the end of your answer. For example, if your answer is $1, typing in "1" is the correct answer format. Do not type in "1.00". The firm will give up $ in revenues on the puzzles it was already selling. The firm will gain $ in revenues on the new puzzle sold. The marginal revenue for the 17th puzzle is $ Include the negative sign, if applicable