Mathemagic

This is an Arithmetic Problem. Can you figure it out?
Do not read the bottom until you have worked it out.

1. How many days a week would you like to play science games?
    (choose a number from 1 to 7)
2. Multiply this number by 2
3. Add 5
4. Multiply it by 50
5. If you have already had your birthday this year add 1756.
    If you haven't add 1755
6. Subtract the four digit year that you were born.

You should have a three digit number

The first digit of this is the number of times you want to play science games each week.

The second two digits are your age.