Multiply and adding up multiple items does not show total in the end

What steps will reproduce the problem?
1. Select item to show the total cost of items

When I get to the end of the form ODK collect should display total value,
this works fine if I selected both items, but if i skip one the grand total
comes up blank

I am using ODK collet version 1.4 (1038) in with Android Samsung Galaxy tab, 

I am attaching the xlsform

Original issue reported on code.google.com by akakoro...@gmail.com on 8 Apr 2014 at 10:24

Attachments:

delivery_test.xlsx

wsharba / opendatakit

Multiply and adding up multiple items does not show total in the end #995