Hi everyone,
I hope someone can help me with this formula its doing my head in. I would like to add a formula to my invoice that will give minus 15% off the Sub total.

This is what i am trying to do





Sub Total $12.00
Less 15% would like the 15% formula to go here
P&H $3.50
Grand Total $15.50

I hope someone can help me out

thanks inadvance.

Shelley