Timesheet formula to subtract 1/2 a hour lunch only if 6 hours are worked

Good Morning,

I am trying to create a work schedule that will automatically subtract a 1/2 hour lunch provided the employee is scheduled to work more than 6 hours. I've attached (I hope) a workbook with an sample of my formula. (I'm using the second sheet to calculate the number of hours worked.)

The below formula calculates the hours fine.

=(Schedule!B3-Schedule!B2)*24

When I use the below it subtracts the 0.5 even if 0 hours are scheduled and I'm not excel savvy enough to figure out what I'm doing wrong!

=(Schedule!B3-Schedule!B2)*24+IF(6,-0.5)

Thanks in advance for your help.

Thanks for the reply. I'll try it out tomorrow and let you know how it goes.