Cost, Marked Price & Selling Price 成本、標價與售價

Cost & Selling Price 成本與售價
Cost, Marked Price & Selling Price 成本、標價與售價
gMath 互動數學教室[br][url=http://www.gmath.hk/]http://www.gmath.hk[/url]
– Alex CHIK

Information: Cost, Marked Price & Selling Price 成本、標價與售價