iPhone Supported functions and formula

I have an iPhone application called My Docs To Go, I use it to transfer and synchronize my Laptop excel sheet file to my iPhone.

Unfortunately the below formula contain unsupported function by my iPhone app.
=((TEXT(B59,"[h]:mm")-"15:00")*24*1.5+15)*nnn.n
(nnn.n) is the only variable number the rest of the formula numbers are fixed.

The supported functions by my iPhone app are listed under the following link:
http://support.dataviz.com/support.srch?docid=14404

I need help please in editing my above formula using the supported functions of my app from the given link above and end up with the same formula result I use to have on my laptop excel file in order to us it on my iPhone app.

whats in b59?

Given we need to remove TEXT perhaps:

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So it seems as though you get 1.5 for hours above and beyond 15, correct ?

If the above is indeed the case then given you can use MIN & MAX perhaps you could use:

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Without knowing where else B59 is utilised (other than in the above) I confess I would be inclined to modify the function in that cell to :

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