if you read the site it says still under construction. and the delivery has not yet been sorted out.
If you give out a price in future then, say whether it includes vat/delivery to make it clear. Too many suppliers hide behind this vat/delivery when giving prices, just my take on things

I got the figures off your site, if it's under construction and delivery not yet been sorted, then why show it :

Angle Pole Adaptor £4.67 £4.67
Subtotal £4.67
Delivery method Postal Service £7.50
Payment method Cash in Advance
Total amount £12.17
Total amount (without VAT) £10.36
included VAT: standard (17.5 %) £1.81