Your dealer really reamed you there; in no way should that be $629, even in CAN. (That last item really isn't a "brake service"; that's to make it sound expensive... if you read Item 9 on Honda Canada's website, it's just a bunch of eyeball inspections. (At my dealer, they literally do this every time a vehicle rolls through the door, gratis, along with doing a battery check.) All those services combined should be closer to $350 or so.
1) prices for service DO vary by region and state. Labor prices being what they are and how they vary by state and region.
2) most service for vehicles now days in well regulated states require that each service have a specified labor time and price for labor in a table which must be submitted and approved by the state entity in charge of regulating such things. Sadly, years of bad services and charges have driven many states to step in and force these things into fixed price tables. That limits and quantifies costs to consumers, but if the service takes less time, the price remains the same. Of course if the service takes more time, the price remains the same as well.
3) I have a reasonable understanding of the ranges of prices from Honda dealers for defined MM services (you can look them up at many dealership websites). B oil service will be somewhere between 79 and 139 dollars at dealerships (depending on what they include in that service) and depending on state/region, and many dealers include the brake service and other inspections as part of that (mine does). For differential service, it will be 150-225, and brake fluid service will be 175-225.
And of course you have taxes, shop supplies, and disposal fees that are typically above and beyond. Like it or not... taxes exist.. and shop supplies is a common and legal "peanut butter" that some shops use (not just dealers) to cover any incidental parts or supplies used during service (rather than nickel and dime charges for screws, other fasteners, shop towels, cleaning supplies, etc). Disposal fees would be any state mandated "pay as you consumer" fees to dispose of old components, fluids, etc. Why do states impose disposal fees, you ask? To encourage these items to be properly disposed of in state approve recycle and recovery services, instead of just tossing/dumping them into local land fills or out in empty fields somewhere.
So really, 629 is on the high side of what I have observed for dealer service pricing, but it is not unusual. It is however unusual to need MM codes 1679 all at one service visit, so the total here for one service visit is atypical for routine service work like this.
The other factor to consider, is if you are a long standing customer of a dealership they very often give you discounts on their list price fees as part of loyalty recognition. Normally, my dealer discounts from their list prices for services ~ 20% for my vehciles. One of the advantages of sticking with a dealer who you trust to perform service work well.