I believe I’m being pinged with notifications for this thread as I have a current student at Whitman (who also happens to be in a cappella!). @r25 You may want to consider deleting your photo from your profile to keep you and your daughter anonymous through this process 
Here are a two comments I’ve written regarding Whitman in other threads:
Here - in response to someone looking for the outdoors, along with a note about classes, etc.
Here - on the early financial/merit aid guarantee
You’re very lucky to have a grandmother who can contribute to costs, that’s wonderful! That said, echoing @tsbna44, you must find out what that tangibly means so that you are able to form a list of college options that are within the budget. Many, many, many grandparents these days have no idea how college costs have exponentially escalated, and many grandparents believe that their smart grandchildren will of course win a scholarship because that’s how it’s always worked.
Grandparents may be offering to “pay for college” but they just do not know that colleges can cost $400k these days, and their “smart” grandchildren do not necessarily get big scholarships/discounts. It’s just not how it works.
To give an example of the “discount” process: in my family’s instance, graduating debt free was a condition in making up my student’s college list; we didn’t qualify for need based aid, but there also was a finite budget. So this meant that if my student wanted to attend a LAC, they needed to pursue schools where they had a strong chance of good merit money. In a nutshell (and oversimplifying but not by much!): high merit awards are given at schools that are not highly rejective, to the students that are “high stats” for that particular school in comparison to their general student body.
So in my student’s case it meant schools such as Whitman and St. Olaf were on the list, for they would get a high merit award at each school based on their GPA and test scores, but Carleton was sadly crossed off the list, as Carleton doesn’t award merit, for it’s a highly rejective college and only awards need based aid. C’est la vie. In my student’s case it all worked out very well, for they received an amazing merit award at Whitman and it’s been a terrific fit for them, and they’re graduating without debt and with money leftover.
So…all that said, check in with grandmother so you are clear eyed when considering the costs for each school.
Then, as you and your daughter are making up your list of prospective schools, you’re seeking the sweet spot between the right academic fit, social fit, and financial fit. And, if grad school, law school, med school are part of the future plan….the financial fit should extend to considering those overall costs.
Finally, there is a fourth crucial variable to the academic/social/financial fit picture: likelihood of acceptance. Don’t make the mistake that so many students and families make at the beginning of this path: focusing on one or more “dream schools” and drawing up a list that is full of highly rejective schools, or schools that are a low likelihood of accepting your student, and then throwing in a couple of “safeties” that the student’s never visited, and would dread attending.
And remember not to take any of this personally! Being rejected from a highly rejective school is the normal result for almost all of their applicants. Being told that you have a low likelihood of being accepted at multiple places is no reflection on how great of a kid you are, it’s simply the math of it all.
Feel free to DM if you have any questions about Whitman that I might answer. We’re in the PNW as well