diff --git a/hardware/contact_printer_BOM.csv b/hardware/contact_printer_BOM.csv
index a77ef90..ef6ad30 100644
--- a/hardware/contact_printer_BOM.csv
+++ b/hardware/contact_printer_BOM.csv
@@ -1,6 +1,6 @@
 module,quantity,part,part_id,description
-contact_printer,4,2020 Aluminum extrusion 260mm,N/A,Sides and central frame
-contact_printer,2,2020 Aluminum extrusion 420mm,N/A,Top and bottom frame
+contact_printer,1040,2020 Aluminum extrusion mm,N/A,Sides and central frame 4x 260mm
+contact_printer,840,2020 Aluminum extrusion mm,N/A,Top and bottom frame 2x 420mm
 electronics_panel,4,M3 hex cap bolt 6mm,N/A,Attach the GPIO breakout board to the panel
 electronics_panel,1,ESP32 GPIO breakout board,N/A,To make the ESP32 dev board easier to wire
 electronics_panel,6,M3 sliding t slot nut,N/A,Attach the frame to the electronics_panel
diff --git a/hardware/contact_printer_BOM_total.csv b/hardware/contact_printer_BOM_total.csv
index 3e32dbf..09b5ff2 100644
--- a/hardware/contact_printer_BOM_total.csv
+++ b/hardware/contact_printer_BOM_total.csv
@@ -1,15 +1,14 @@
 quantity,part,part_id,price
-4,"M4 hex bolt 40mm",N/A,240
-25,"M3 sliding t slot nut",N/A,125
-25,"M3 hex cap bolt 8mm",N/A,200
-8,"M3 hex cap bolt 6mm",N/A,56
-1,"M3 hex cap bolt 12mm",N/A,8
-1,"L298N Motor driver module",N/A,287
-1,"ESP32 GPIO breakout board",N/A,599
-1,"ESP32 Dev board",N/A,666
-1,"608-RS Ball Bearing",608-RS,17
+4,"M4 hex bolt 40mm",N/A,244
+25,"M3 sliding t slot nut",N/A,143
+25,"M3 hex cap bolt 8mm",N/A,225
+8,"M3 hex cap bolt 6mm",N/A,59
+1,"M3 hex cap bolt 12mm",N/A,9
+1,"L298N Motor driver module",N/A,288
+1,"ESP32 GPIO breakout board",N/A,600
+1,"ESP32 Dev board",N/A,667
+1,"608-RS Ball Bearing",608-RS,18
 2,"250RPM DC geared motor",JSX40-370,2998
-2,"2020 Aluminum extrusion 420mm",N/A,510
-4,"2020 Aluminum extrusion 260mm",N/A,640
+1880,"2020 Aluminum extrusion mm",N/A,1141
 1,"100RPM DC geared motor with encoder",N/A,1619
-76,TOTAL,N/A,7965
+1950,TOTAL,N/A,8011
diff --git a/hardware/prices.csv b/hardware/prices.csv
index 38d2861..8df8c09 100644
--- a/hardware/prices.csv
+++ b/hardware/prices.csv
@@ -4,8 +4,7 @@ M3 hex cap bolt 6mm,N/A,726,100,https://amzn.to/3AwiZxo
 M3 hex cap bolt 8mm,N/A,899,100,https://amzn.to/3YEvWNB
 M3 hex cap bolt 12mm,N/A,836,100,https://amzn.to/48CGa5Y
 M3 sliding t slot nut,N/A,599,105,https://amzn.to/48GRrSU
-2020 Aluminum extrusion 260mm,N/A,7399,46,https://amzn.to/418OicC
-2020 Aluminum extrusion 420mm,N/A,7399,29,https://amzn.to/418OicC
+2020 Aluminum extrusion mm,N/A,7399,12200,https://amzn.to/418OicC
 100RPM DC geared motor with encoder,N/A,1619,1,https://amzn.to/3UF707G
 250RPM DC geared motor,JSX40-370,1499,1,https://amzn.to/3NWkcRL
 ESP32 Dev board,N/A,1999,3,https://amzn.to/3NXCvGj
diff --git a/scad/contact_printer.scad b/scad/contact_printer.scad
index 04d683a..164b30b 100644
--- a/scad/contact_printer.scad
+++ b/scad/contact_printer.scad
@@ -1600,8 +1600,8 @@ module debug_lamp () {
     gate_carrier([0, -2.5, 11]);
 }
 
-//BOM: 2, 2020 Aluminum extrusion 420mm,N/A,Top and bottom frame
-//BOM: 4, 2020 Aluminum extrusion 260mm,N/A,Sides and central frame
+//BOM: 840, 2020 Aluminum extrusion mm,N/A,Top and bottom frame 2x 420mm
+//BOM: 1040, 2020 Aluminum extrusion mm,N/A,Sides and central frame 4x 260mm
 module contact_printer () {
     //debug module for BOM
 }
diff --git a/scripts/bom.sh b/scripts/bom.sh
index 51cd605..e1be15b 100644
--- a/scripts/bom.sh
+++ b/scripts/bom.sh
@@ -52,7 +52,7 @@ done
 
 echo "quantity,part,part_id,price" > "${TOTAL}"
 sqlite3 :memory: -cmd '.mode csv' -cmd ".import ${DESTINATION} bom" -cmd ".import ${PRICES} prices"\
-  'SELECT SUM(quantity),part,part_id, SUM(quantity) * (COALESCE((SELECT CEIL(prices.price / prices.quantity) FROM prices WHERE prices.part = bom.part LIMIT 1), 0)) as price FROM bom GROUP BY part ORDER BY part DESC;' >> "${TOTAL}"
+  'SELECT SUM(quantity),part,part_id, CAST( CEIL( CAST(SUM(quantity) AS FLOAT) * (SELECT CAST(prices.price AS FLOAT) / CAST(prices.quantity AS FLOAT) FROM prices WHERE prices.part = bom.part LIMIT 1) ) AS INTEGER) as price FROM bom GROUP BY part ORDER BY part DESC;' >> "${TOTAL}"
 
 sqlite3 :memory: -cmd '.mode csv' -cmd ".import ${TOTAL} bom" -cmd ".import ${PRICES} prices" -cmd '.mode markdown' \
   "SELECT part as Part, quantity as Qty, \