You do not know (probably) what her commission (the net to her) is; the amount that the listing agent gets and the selling agent varies for 2 reasons:
(1) depending on whether her office is the seller or whether it is listed on MLS (Multiple Listing Service) and another real estate office sells it. Typically, the commission on residential sales is 6% ... therefore her office would get only 3% if another broker sells her offices listing of your property (on the condo).
(2) assuming she is an associate (not the broker owner of the real estate company she works with), she gets only a % of what her offie receives (whether they receive a full 5 or 6% or, alternatively, based on the % she gets as the listing agent wishing her office. And, assuming she lists your condo but some other agent (in her office) is the Selling Agent, the commission would have to be split up 3 ways (part to Broker/owner, part to your friend as the Listing Agent and part to the Selling Agent. Those % vary from office to office, and can even vary from time to time wishing an office (i.e. if the office is low in listings, the % the office gives to the LISTING agent, might be increased and the amount to the selling agent might be decrease; these % can range from 10% to 50% (in general and could go below or above that range; for example if there is a flood of houses for sale but not many buyers, Listers % could go down and the % to sellers could go up.
So, you do not know what % of the 5% commission she will get, as the Listing Agent (on the condo) or as the Buyers Agent (if she is going to be your "Buyer's Broker" on the new home to be purchased). Too many variables and too many differences from one office to the next and you don't know if she will be the selling agent on the condo and/or the selling agent, or if it will be an "in-house sale" with all the commission going to her office or a co-broker sale by another office.
Additionally, if her office and the MLS norm in the area is 6% (very common), you don't know (probably) if this means it will be 5% in the MLS so a co-broker must take 2.5% (instead of 1/2 or 3%) or whether her office is giving up a full 1% to take only 2% (i.e giving up 1/3 of their normal 3% commission of 1/2 on a co-broke). And if her office is giving up 1% you don't know how much she is personally absorbing of the discount vs how much he broker is absorbing and if an in-house seller also gets a reduced commission on an in-house sale.
Due to all these variables, it is impossible for anyone other than her and her office to know just how much she is personally giving up (as a sum of money or as a % of what she would otherwise get). And you do not know how hard she might have had to work to get her Broker (assuming she is not a broker/owner, but is an associate in the office) to let her take the listing at 5% if 6% is the norm in her office (some offices might routinely do such discounts, some may rarely do it ... as it can affect the incentives/efforts of other real estate offices/Realtors to want to sell your place where the commission is discounted on MLS and to the selling office/Realtor.