How do you set different rates (i.e add on charges)?

Hello,

I'm newer to Rover and have been slowly building my clientele. I've been mostly dog/house sitting where I will stay at the dog owners house for a full 24 hours (this is my only source of income at the moment). I had set my rate at $35 to be fair, as I was comparing to other dog sitters on Rover. However, I'm now learning that i'm extremely under valuing my services (in my humble opinion) as most Rover sitters do not stay and care for the pets for a full 24 hours for their posted rate. Not knocking others, i'm just saying this is what i've found to be the majority :-)

My question is that I've been researching, and found that a number of Rover sitters charge additional rates/fees for extra hours of service (for example when boarding goes past the 24 hours or when house sitting goes past 12 hours). I would like to be able to adjust my rates based on needs but i'm not able to figure out how. Can anyone help with this?