Someone here helped me set up my shopping age so it would add up
across and down.  I have added some items to the page and now it will
not add down.  I have checked everything I can think of with no
success.  Any help would be appreciated.
http://io.amigoslink.org/commerce/mdse2.html

I'm not sure what the problem is but I hope your dollar totals are
calculated server side and not client side as they seem to be.  Even
though clicking on the price on your page generates "please do not
edit this field" anyone who knows anything about html could get around
that and put in their own values.

Since it appears I'm not allowed to answer your question, I'll place
my response here.

Here are a couple fixes that should do the trick:
On line 87 you define an array. In this array you define, you need to
change the third item "box.form.Amt40cup" to "box.form.Amt40Cup"
(capitalize the 'c').

Also, on line 103, change the statement
"sum += arrayOfBoxes[i].value * 1;"
to
"sum += Number(arrayOfBoxes[i].value);"

Thanks, waterfool-ga!  That did it.  I knew it was something like that
and I looked and looked, but didn't see the lower case 'c'  Takes
fresh eyes sometimes.
Thanks-a-million.