Cheaper to buy download version from Corel USA eshop.
Full version US$100 (Sing$145)
Upgrade version US$60 (Sing$87)
Few days ago, this promo code UG40OFFSEP was still valid. The code gives you 40% discount off the above 2 prices.
In other words, US$60 (Sing$87) and US$36 (Sing$52) for full and upgrade versions respectively.
No harm trying the promo code if one buys from the Corel eShop.