The correct answer is 540 option b, could anyone give me step by step solution.

7. Details of a limit order book are as follows. BIDS ASKS QUANTITY PRICE PRICE QUANTITY 100 52 54 540 250 51 56 100 120 49 57 100 An investor submits a Fill-and-Kill buy order for 600 shares at a price of 55. The number of shares traded is closest to a. 0. b. 540. c. 600. d. 640. 7. Details of a limit order book are as follows. BIDS ASKS QUANTITY PRICE PRICE QUANTITY 100 52 54 540 250 51 56 100 120 49 57 100 An investor submits a Fill-and-Kill buy order for 600 shares at a price of 55. The number of shares traded is closest to a. 0. b. 540. c. 600. d. 640