I am trying to figure out a formula to figure out how much to charge for hrs of a rental. There is an automatic $1000 charge regardless of time used. the rate chart is as follows:

$1000 + hourly charge = total

=<50 hrs= $15/hr
>50hrs but <100hrs= $6.50/hr
>100hrs=$4.10/hr

ex: so is A1= 200hrs then i want B1 to equal $1820.($1000 + (200 x 4.1))=1820.

I have an idea on how to write the formula, but i am having a little bit of trouble with it.