Mr Tan had some money. He bought some regular-sized burgers and some extra-large burgers. He bought 5 extra-large ones and 4 regular-sized ones with $63.35. He could not buy another extra-large burger with the remaining amount as he was short of $0.30. Instead, he bought 2 more regular-sized burgers and had $0.75 left.
a) How much more did each extra-large burger cost than 2 regular-sized burgers?
b) How much did Mr Tan have at first?