Calculating Selling Price Formula in Excel

Hi,

I am quite new to this forum, I am working on a formula to calculate the selling price based on variables available including Item cost, commissions on sale, postage charge and fixed profit.

Example will be as follow:

Cost of the item = £10

Postage charge = £0.50

1st Commission on Sales = 9% (this include VAT of 15%)

2nd Commission on Sale = 1.9% (No VAT on this)

The Fixed Net Profit after deducting all VAT to make on this sale = £1

(Note: the selling price inc 20% VAT)

Any suggestions or help would highly be appreciated.

Thank you