price question with import

Just wondered I did a calculation of the original price of £39.84 from Play Asia with the £3 shipping coming to £42.85 then I found the total would be £52.11 with VAT been £7.76 and duty been £1.50 does that sound right Standard Duty rate for Games is 3.5%?

If so do they just add on another £10 to the full price?