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====== AddPlanToInventory ======
AddPlanToInventory(<-plan <-amt <-rowHint)

===== Description =====
Adds a plan to the inventory. Amt is the number of to add.  RowHint is the row to add the plan to, if possible.  Pass in -1 for rowHint if you don't care.

===== Examples =====
<code 4rpl>
</code>