diff --git a/abrechenbarkeit.lua b/abrechenbarkeit.lua
index 6a1543e..5db7337 100755
--- a/abrechenbarkeit.lua
+++ b/abrechenbarkeit.lua
@@ -163,8 +163,8 @@ local function read_products()
         if l == "" or l == nil then
             return nil
         end
-        local barcode, price, name = string.match(l, "([%w_-]+),(-?%d+),([%w_ -]*)")
-        return barcode, tonumber(price), name
+        local barcode, price, name, owner = string.match(l, "([%w_-]+),(-?%d+),([%w_ -]*),([%w_ -]*)")
+        return barcode, tonumber(price), name, owner
     end
 end
 
@@ -223,14 +223,24 @@ local function r_user_post(username)
     local comment = data.comment
     local pcode = nil
     local pcount = nil
+    local powner = nil
     if data.pcode then
-        for p_barcode, p_amount, p_name in read_products() do
+        for p_barcode, p_amount, p_name, p_owner in read_products() do
             if p_barcode == data.pcode then
+            	powner = p_owner
                 pcount = (tonumber(data.pcount) or 1) * (data.negate_pcount ~= nil and -1 or 1)
                 pcode = p_barcode
                 if amount == nil then amount = pcount * p_amount end
-                if comment == nil then comment = string.format("%s %d %s", pcount < 0 and "Buy" or "Restock",
-                        math.abs(pcount), p_name) end
+                if comment == nil then
+                	comment = string.format("%s %d %s", pcount < 0 and "Buy" or "Restock",
+                        math.abs(pcount), p_name)
+                        
+					powner_comment = string.format("%s %d %s %s %s",
+						pcount < 0 and "Sell" or "Restock", -- TOOD: look for name
+						math.abs(pcount), p_name,
+						pcount < 0 and "to" or "by",
+						username)
+                    end
             end
         end
         if amount == nil then
@@ -248,7 +258,12 @@ local function r_user_post(username)
         return error_box("failed to open log")
     end
     local time = os.time()
+	-- subtract from buyer
     log:write(string.format("%d,%s,%d,%s,%s,%s\n", time, username, amount, pcode or "", pcount or "", comment))
+    -- add to owner
+    if powner then
+	    log:write(string.format("%d,%s,%d,%s,%s,%s\n", time, powner, -amount, pcode or "", pcount or "", powner_comment))
+    end
     log:flush()
     log:close()
     return string.format([[
@@ -429,9 +444,9 @@ local function r_products_post()
         if new_products == nil then
             return error_box("failed to open new products")
         end
-        for a_barcode, price, name in read_products() do
+        for a_barcode, price, name, owner in read_products() do
             if barcode ~= a_barcode then
-                new_products:write(string.format("%s,%d,%s\n", a_barcode, price, name))
+                new_products:write(string.format("%s,%d,%s,%s\n", a_barcode, price, name, owner))
             end
         end
         new_products:flush()
@@ -450,7 +465,11 @@ local function r_products_post()
         if products == nil then
             return error_box("failed to open products")
         end
-        products:write(string.format("%s,%d,%s\n", barcode, price, name))
+        local owner = data.owner or ""
+        if name:match("^[%w_ -]*$") == nil then
+            return error_box("owner invalid")
+        end
+        products:write(string.format("%s,%d,%s,%s\n", barcode, price, name, owner))
         products:flush()
         products:close()
     end
@@ -472,6 +491,8 @@ local function r_products()
                 <input type="text" name="name" id="name" />
                 <label for="price">Price (ct): </label>
                 <input type="number" name="price" id="price" />
+                <label for="owner">Owner: </label>
+                <input type="text" name="owner" id="owner" />
                 <label for="barcode">Barcode: </label>
                 <input type="text" name="barcode" id="barcode" />
                 <input type="submit" value="Add" class="amount-ntr button" />
@@ -485,16 +506,17 @@ local function r_products()
             </form>
             </div>
         ]])
-        print([[<table class="productlist"><tr><th>Name</th><th>Price</th><th>Barcode</th><th>Count</th></tr>]])
+        print([[<table class="productlist"><tr><th>Name</th><th>Price</th><th>Barcode</th><th>Count</th><th>Owner</th></tr>]])
         local pbals = product_balances()
-        for barcode, price, name in read_products() do
+        for barcode, price, name, owner in read_products() do
             print(string.format([[
-                <tr><td>%s</td><td class="amount-%s">%.02f€</td><td>%s</td><td>%s</td></tr>
+                <tr><td>%s</td><td class="amount-%s">%.02f€</td><td>%s</td><td>%s</td><td>%s</td></tr>
             ]],
                 name,
                 -price >= 0 and "pos" or "neg", -price / 100,
                 barcode,
-                pbals[barcode] or "0"
+                pbals[barcode] or "0",
+                owner
             ))
         end
         print("</table>")