Part f is incorrect and it rounds itself up to 139,481; what did I do wrong?

Belleterre Tiles makes tiles for flooring and other applications. The CFO of the company provides you with the following information for the period October through December, the company's third quarter: Required: a. What is the average selling price per tile? Note: Round your final answer to 2 decimal places. b. What is the average variable cost per tile? Note: Round your final answer to 2 decimal places. c. What is the average contribution margin per tile? Note: Do not round intermediate calculations. Round your final answer to 2 decimal places. d. What is the current operating profit for a quarter? Note: Do not round intermediate calculations. e. What is the break-even point? Note: Do not round intermediate calculations. f. The CFO tells you that the company owners have said that unless the quarterly operating profit exceeds $15,400, they will liquidate the company. How many tiles would have to be sold in a quarter for Belleterre Tile to earn $15,400 in quarterly operating profit? Note: Do not round intermediate calculations