买了两个free的items，合在一单结的。小二给了两份收据、两个rebate form。rebate
offer
number是不同的。
网上提交时，看到这样一句话：“For promotions with more than one eligible
product,
please add the rebate only once.Our system will use the Easy Rebate ID
number from
your receipt to verify the number of products purchased. ”
挺迷糊的，我该提交一份还是两份rebate啊？
