Virtuemart Pricing issue

[prabhash76]

Hello
I have installed vm and show product but now i have faced one serious problem related to price.
When i have added product in cart and the price that show and calculate the total is different.
Means VM calculate the total is differ when i calculate all the price in simple calculator.
i show but i have faced.
Product price = +527.94
Discount price = -10.56
Vat Tax price = +41.43
VM total = 559.59 (Product price+Vat Tax price-Discount price)


And if i calculate these price from calculator then
Total = 558.81 (Product price+Vat Tax price-Discount price)

This is formula for calculating total (Product price+Vat Tax price-Discount price)
Can any one please solve this.
Thanks.

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