You can enter the Currency symbols such as the £, ¥ or € by using the numeric keypad and ALT key.
To enter the ¥, press and hold on to the ALT key and press 0165 on the numeric keypad.
To enter the £, press and hold on to the ALT key and press 0163 on the numeric keypad.
To enter the €, press and hold on to the ALT key and press 0128 on the numeric keypad.
Note that the above method will only work with the numeric keypad (the number pad on the right side of the keyboard and the simulated number located near the right of the laptop, usually need to be activated for the laptop). It does not work with the number keys located on the top of the keyboard.