Chloes Cafe bakes croissants that it sells to local restaurants and grocery stores. The average costs to bake the croissants are $0.55 for 3,600 and $0.50 for 7,200. Required: If the total cost function for croissants is linear, what will be the average cost to bake 6,400? (Do not round intermediate calculations. Round your final answer to 4 decimal places.)