Give the step-by-step reasoning process and then the final answer. Two siblings, Eman and Frank, agreed to buy a new computer table, computer chair, and a joystick. The computer table costs $140, the computer chair costs $100, and the joystick costs $20. Eman agreed to pay for the computer chair while Frank agreed to pay for the computer table. Then Frank agreed to pay 1/4 of the price of the joystick and the rest will be paid by Eman. How much more money will Frank spend than Eman?
Frank will pay $20 x 1 / 4 = $5 for the joystick. Eman will pay $20 - $5 = $15 for the joystick. So, Frank will pay a total of $140 + $5 = $145. While Eman will pay a total of $100 + $15 = $115. Therefore, Frank will spend $145 - $115 = $30 more than Eman.
The final answer: 30.