add 9v battery and holder to BOM

diff --git a/bill-of-materials.rkt b/bill-of-materials.rkt
index 064ce849723933fdd7a7038f403296457ecd5fa2..86ebfd5ec643f6b38e1dc750f44cb34d000a8586 100755 (executable)
--- a/bill-of-materials.rkt
+++ b/bill-of-materials.rkt
@@ -43,7 +43,6 @@
 ;; TODO: add 3d printer filament cost for wheel, sonar sensor holders,
 ;;       caster standoff
 ;; TODO: add ball caster
-;; TODO: add 9v battery holder and 9v battery
 ;; TODO: checkout the following, if it's not a fraud, buy for next class
 ;;; (string-append
 ;;;  "http://www.ebay.com/itm/UNO-R3-Development-Board-MEGA328P-"
@@ -150,7 +149,17 @@
               (string-append
                "http://www.jameco.com/webapp/wcs/stores/servlet/Product"
                "_10001_10001_36792_-1"))
-   (make-item "4xAA battery"
+   (make-item "9v battery"
+              1 (/ 9.99 5) 1
+              "http://www.frys.com/product/5234117"
+              "can get in store")
+   (make-item "9v battery holder"
+              1 (/ 1.25 10) 1
+              (string-append
+               "http://www.jameco.com/webapp/wcs/stores/servlet/Product"
+               "_10001_10001_2128067_-1")
+              "can get in store")
+   (make-item "AA battery"
               4 (/ 17.99 100) 1
               "http://www.frys.com/product/6292850"
               "can get in store")