SO Line - input value including VAT

Is there a way when creating an SO Line of inputing the VAT inclusive value, for example a sale is for £10 inc VAT i want to be able enter £10 on the so line and then the VAT to be worked out so would look like

Total W.T. = £8.33
Total Tax = £1.67
Total ATI = £10



Maybe you can use the “[CDATA]” template to do it (using angular.js methods)