Is there a "standard" discount rate? If so, please advise. Thanks.

THE COST OF TRUTH is a collection of 32 powerful and personal faith stories of Mennonite and Brethren who have been denied leadership in the church relating in some way to their sexual orientation or acceptance of of other GLBT people. This third book in a series of faith stories follows FROM WOUNDED HEARTS and TOGETHER IN LOVE. Editor Roberta Showalter Kreider has, once again, compiled a collection of stories that calls the church to honest, faithful, and open dialogue on this most divisive issue. The final chapter is not a single story, but rather a collection of eighty-four responses with one hundred eleven signatures answering the question: Why I Believe That Gay, Lesbian, Bisesual, and Transgender People Should Be Included in the Church on an Equal Basis with Everyone Else.