Southwest Wyoming lease offer- is this a low ball offer

Does anyone know about how much a lease offer in Southwest Wyoming should be? I was offered $25 an acre. My family and I own 50% of the acreage that is involved in the well drilling. They also offered 15% royalty and want us to pay 15% marketing costs. The company is Forest Petroleum.

Without more of the specifics, this seems on the lower side from my experience. Let me know if you’d like to get in to more detail.