We assume Jill's full-time work week is 40 hours, so that any hours in excess of that are overtime.
There are a couple of ways to think about overtime pay.
1) Figure the number of overtime hours, and multiply that number by 1.5 times the base pay. (OT pay) = (OT hours)*(1.5*(base pay))
2) Figure the number of overtime hours, and multiply that number by 1.5, then by the base pay. (OT pay) = ((OT hours)*1.5)*(base pay)
You can see the product is the same, only the sequence of computation is changed.
Then Jill's gross earnings can be computed as ...
(40 h +(6 h)*1.5)*(base pay)
(49 h)*($18.59/h) = $910.91
Jill's gross earnings for 46 hours' work will be $910.91.
