Rhiannon is wondering if she should also pay the helper a sales commission of $1 per ring sold. This would allow Rhiannon to focus more on production. In addition to producing 1,500 rings a year by herself, Rhiannon is wondering if she can gather and prepare stones for cheaper. Assuming 100 stones per month, she estimates the added fuel expense for this approach would total $150 per month (Rhiannon isnt sure if other vehicle costs like insurance should be included). Materials to prepare the stones for mounting would total $100 a month. Rhiannon is wondering if she should consider other factors like time spent- she expects to spend 6 hours a month gathering, cleaning, and coating stones. She is wondering about potential pros and cons of producing her own stones, outside of projected cash flows.