Nested IF functions?

Hi Everyone

I'm trying to work out the best way of Achieving a minimum figure (of £11.90) in column H of the attached spreadsheet. I know I can do this with an IF function, but I already have the result of another IF function in that column. In Column D, I can pick either Wholesale or Trade and the results either go in column G or H depending on the choice.

A bit of background! The figures are derived from the totals in Column F but if this figure falls below £79.56, a minimum send out fee of 11.90 applies. This is the figure I am having trouble with. This only applies to the Trade 15% column not the wholesale 6%.

Thanks in advance.