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2015-09-29T14:13:03+08:00

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- Paggamit ng barya at sinsilyo sa pakikipagkalakalan.
                                                                               -KookEin
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2015-09-29T15:22:57+08:00
- Barter
- Barya
- Kalakalan (dahil natuto na sila ng Barter at Barya, madali na sa kanila ito)
- Gymnasium-Bathroom 
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