X User enters a number (hourly pay)
X User enters hours per week

Ask, and if so, then do it:
User enters a percentage to be taken out (taxes, etc)

X Program returns

Hourly pay: (what user entered)
Hours per week: (what user entered)

X Pay per second: 
X Pay per minute: 
X Pay per hour: 
X Pay per week:
X Average pay per month: 
X Pay per year