£4.95 prices showing as £4.96 in cart!

I have several CDs in my new store priced at £4.95 (£4.125 excluding UK VAT of 20%). However, as soon as the are put in the cart, the price increases to £4.96 (£4.12). Is there anything I am doing wrong?

I have the price in the product fields as £4.12500 and £4.95. This is correct (4.125 + 20% = 4.95)

I have only just opened the site and have not checked all the prices, but it also happens with CDs priced at £10.95 and £16.95.

I also received a "A Paypal notification was refused because the amount received (6.45GBP) is different from the order amount (6.46GBP)" (with £1.50 postage added).

My store is at - organs.co.uk

Thank you.

I've done both. The CDs still show as £4.95 (£4.13 excl VAT), but when you look at the cart, it has changed to £4.96 (£4.13 excl VAT).

Try adding this CD to the cart:

organs.co.uk/index.php/component/hikasho...-again-2011?Itemid=1

...Ian

PS. See attached cart image.

I have just disabled the "HikaShop tax calculations override plugin" and that seems to have worked