How does Rover calculate the total $ my customer have to pay?

When the dog owner sends you a stay request, Rover calculates the total number of nights, then figures out if it's a holiday. If it isn't, then it multiplies the total number of nights by your regular nightly rate (if it is a holiday, it multiplies by your holiday rate). If the owner has an additional dog they're requesting a stay for, then Rover will add in whatever your additional dog rate is multiplied by the total number of nights. BEWARE! Dog owners can adjust the price in their request (basically as a way to negotiate) without mentioning it to you or they can request a stay for two dogs but only put one dog in the request. Always make sure the math is right before you finalize the booking.

It really is just simple math, except one aspect of your rates makes no sense, which may be causing the problem. Usually when sitters have an extended stay rate it is less than the per-night charge--yours is higher. Also anything over one night would incur the extended stay rate, when hardly anyone would consider two nights an extended stay. You need to straighten out those two components (what constitutes an extended stay and its rate, which is usually lower than the normal) and then it should be easy to understand the math.

I think your confusion may be in the use of the nightly rate and the extended stay rate. Right now, the only way anyone would get your nightly rate is requesting the same start and end date for a stay (and even then I'm not sure if that would calculate it correctly). The nightly rate is your price for watching one dog in your home for approximately 24 hours. The extended rate is the rate your nightly rate will change to if that one dog stays for a long stay. Most sitters I've seen who use the extended rate have it set for stays longer than a week or so. As Karen said, for most sitters, the extended rate is lower than their normal nightly rate. Longer stays tend to be easier for us since we only have to do one M&G, and the dog has a chance to really settle in and get used to your environment. It's also usually better for us financially to book one dog for a long stay than to hope we get requests to fill the same amount of time with shorter stays (and even if we do, there's more legwork involved communicating with and meeting many different clients). Additionally, discounts are appealing to customers. That said, I've known a couple hosts who do have a higher extended stay rate than their normal nightly rate. In those instances they were sitters who were concerned about the potential future loss of returning clients stemming from being unavailable for a long period, or sitters with a large client base who were always fully booked, so taking long stays prevented them from having a slot open for their other regular customers. Due to the inconvenience it caused their other clients, these sitters chose to have a higher rate for extended stays.