Hello again Romeo (my first name is Rod - Darby (not Dorby) is my surname),
Ok, you are still not making sense but, hey, go with the flow is my motto (I think you mean "which includes expat benefits, but let it pass).
GHS 100 = about USD 47
Rent: around 400 - 600 GHS per month for an unfurnished, 4-bedroomed house. Furnished is usually MUCH more expensive;
Maid: 100 - 150 GHS / month;
Utilities (electricity, water, gas for cooking): depends a bit on consumption, but perhaps another GHS 150 a month;
Transport: this really depends on where you are, where you need to go and how you plan to travel around;
Food: if you do your own shopping and have your maid cook for you, you should be ok with GHS 400 / month;
Medical: no idea, but there are plenty of expat medical insurance websites. I found them all ridiculously expensive, so I just pay for what I need (which isn't much).
OK, that's it. If you are in fact trying - not very successfully - to say that your company is paying for all that and the USD 750 is "spending money", you will be a rich man.
On that thought I bid you "Good Day"
Rod