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for how to purchase, i plan to print a A4 paper contain 100 grids of 10 cents. first you need to pay S$10. holding this paper, if you buy somethings, just delete the grids accordingly. say ,i buy S$1.80. will delete (hightlighed) 18 grids, and maybe another S$5.00. later will have 32 grids left. we will refund you S$3.2

understand.

any comment?

ssss4

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亮仔

楼主终于找到了