Pricing on booking form for a Families Club

I’m looking for help and advice.im creating a new booking form for a Families Club that I want to self generate a price using drop down menus. So your first option will be a start finish time the difference will give me the hours required for. Then if they want they want bar hire if a no it’s a simple time x 10 an hour however if they require cleaner drop down is yes then add £20 and if they want soft play drop down yes add £20 a further £50 will be added as a deposit. If they click yes to bar then the rate will go up dependant on number of guest which is in a drop menu 0-100 100-150 etc and price goes up so starts at£25 hr then £35 hr. then same as before if they click yes to cleaner add £20 yes to soft play add £50 yes to dj add £25 and the deopisit will need to be £100 I want th systemto generate the price from there option how do I do this? I’ve added picture of current form in word but I want to create this in excel so it’s just option and generates a price so that it will self generate an invoice from the quote.

Hey all, Thank you for the help so far, so I have created a basic sheet. I have left the original information at the bottom.
But in a break down what I want to achieve is this:
If C21 = No then I21*£10
If C21 =Yes, and cell H15 0-100 then *I21 by £25 and add £100
If C21 =Yes, and cell H15 100-150 then *I21 by £35 and add £100
If C21 =Yes, and cell H15 150-200 then *I21 by £45 and add £100
If C21 =Yes, and cell H15 200-250 then *I21 by £50 and add £100
on top of that if cells E21 = Yes Add "25, If F21 = Yes add £25 If cell G21 =Yes Add £20 then add £10 H21.
Giving a total price.