I been using my same stone vendor for years, great relationship with them. They recently went with an online pricing book for all there materials, its been a bit of a learning curve and somewhat hard to navigate. I recently bid a larger wall project and needed to call my vendor with some price info. Long story short I was quoted wrong and lost 1k on materials when I was supposed make 1k on materials. My client had already given the go ahead for the project before I got my bill. I cant/wont come back at my client asking for the extra money. My vendor somewhat worked with me on the material giving me free delivery (30 pallets) but thats a far cry from 1k. Any suggestions how to go about this? I feel at very least the difference should be split. Also this was not a written quote, only verbally over the phone.