Minor update with bug fix is available as of the time of this post (8/14/2017):
In this update:
MyCostPro
 * In certain rare scenarios, combined checkout items could potentially show up twice in sold list.  [resolved]
 * In certain rare scenarios related to combined checkout, sales could be missing from the download.  [resolved]
 * Changed numbering scheme for sales record number for combined checkout
 * Changed naming scheme for Item/Transaction ID (Unique) for combined checkout items
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