diff --git a/table.lua b/table.lua
index 6d3434a..bf9354c 100644
--- a/table.lua
+++ b/table.lua
@@ -97,7 +97,7 @@ local function get_copy_material_cost(meta)
         local scale = smeta:get_int("cartographer:scale") or SCALE_SMALL;
         local detail = smeta:get_int("cartographer:detail") or 1;
 
-        return get_material_cost(size, detail - 1);
+        return get_material_cost(scale, detail - 1);
     end
 
     return {
@@ -417,7 +417,7 @@ minetest.register_on_player_receive_fields(function(player, name, fields)
                 meta:set_int("paper", meta:get_int("paper") + value.paper);
                 meta:set_int("pigment", meta:get_int("pigment") + value.pigment);
                 inv:set_stack("input", 1, ItemStack(nil));
-            end 
+            end
         elseif fields["craft"] then
             local size = meta:get_int("size");
             local detail = meta:get_int("detail");
@@ -575,7 +575,7 @@ minetest.register_node("cartographer:simple_table", {
             {-0.5, -0.5, -0.375, 0.5, 0.6875, 0.375},
         },
     },
-    on_rightclick = function(pos, node, player, itemstack, pointed_thing)
+    on_rightclick = function(_, _, player, _, pointed_thing)
         player_tables[player:get_player_name()] = {
             pos = minetest.get_pointed_thing_position(pointed_thing),
             tab = 1,
@@ -615,7 +615,7 @@ minetest.register_node("cartographer:standard_table", {
             {-0.5, -0.5, -0.375, 0.5, 0.6875, 0.375},
         },
     },
-    on_rightclick = function(pos, node, player, itemstack, pointed_thing)
+    on_rightclick = function(_, _, player, _, pointed_thing)
         player_tables[player:get_player_name()] = {
             pos = minetest.get_pointed_thing_position(pointed_thing),
             tab = 1,
@@ -655,7 +655,7 @@ minetest.register_node("cartographer:advanced_table", {
             {-0.5, -0.5, -0.375, 0.5, 0.6875, 0.375},
         },
     },
-    on_rightclick = function(pos, node, player, itemstack, pointed_thing)
+    on_rightclick = function(_, _, player, _, pointed_thing)
         player_tables[player:get_player_name()] = {
             pos = minetest.get_pointed_thing_position(pointed_thing),
             tab = 1,