I'm trying to calculate operating cash flow and some item is throwing me. I have Sales, COGS, Admin Selling, Depreciation, Interest Exp and a tax...

Hi!

I'm trying to calculate operating cash flow and some item is throwing me.  I have Sales, COGS, Admin & Selling, Depreciation, Interest Exp and a tax rate.  I calculated NI correctly, but am not treating some expense right to get to operating cash flow.  Ideas??

Thanks!!