How do I return an item?   SingaporeMath.com Inc has a 60-day return policy. We do not do exchange. There is a 10% re-stocking fee for returns. Returned item(s) must be unused and be in resalable condition. Materials returned after 60 days and/or in non-resalable condition will not receive a refund, nor will we return these materials to you.  Please return all items in a box of the right size (no envelopes), and use lots of packing material (not newspaper). Please return items to 404 Beavercreek Road, #225, Oregon City, OR 97045. Include a copy of your invoice/packing slip to ensure proper credit. CD-ROMs and audio CDs are strictly non-returnable.  Manipulatives are non-returnable.  Items sold in the Damages/Discontinued Books Corner are non-returnable. Shipping costs are non-refundable.