u/makeamericask8again

I am going to sell my house and the real estate agent I was planning on using sent over her contract today. The broker's compensation is listed at 6% of the sales price and the authority to cooperate and compensate other brokers 2.5% of the sales price. Does this mean I'm paying 8.5% in commission to both agents? Or does it mean I'm paying 3.5% to the selling agent and 2.5% to the buyers agent? What is the standard? Should I not be offering any payment to the buying agent and let them negotiate for it? This is my first house sale so I appreciate the guidance. Thanks.