So my novel is published through a small indie publishing house-- not likely to be ordered by retailers. If I go door to door pedaling my book to local bookstores, and if they agree to give it shelf space, how do I go about charging them for copies(which I have bought myself)? Do I suggest a price for them to sell it at based on how much they cost to me and haggle about who gets how much of the profits? Do I simply tell them I'll bill them later and mail them a bill? What is the proper and professional way to go about this?