Right now those items ARE taxes at the current 35% Business tax rate since each business has to pay it taxes out of profits generated in each sale. SO 9-9-9 would actually reduce the tax burden on these items
Sorry food production of cattle was the Simplest form of getting something from raw material to finished product that I could think of.
Very little added to the Process but labor and Shipping.
And taxing just the Final sale is definitely not a Vat Tax.
But we cannot say which method would reduce the tax burden. For that we would need to know how much Profit the Farmer, Butcher, and Grocer made to calculate their current tax burden.