First, if she used it Monday to Friday, that’s 5 days. 5 x 37 = $185
Secondly, if she used the chainsaw on Saturday and Sunday too, and if 2 x $42 = $84, then she would have paid $84 for the Saturday and Sunday in which she used the chainsaw.
Add up both of cost of the days she used the chainsaw and you get a total of $269
I hope this helped :)