I have noticed that 2 different companies use different formulas to calculate my royalty interest. This is in Ward Co, I have a 1/6 interest in both wells, 25% lease royalty, each well has different NPRI’s. But the first company multiplies the NPRI’s times the lease royalty in parentheses, the second company doesn’t. Since this affects my royalty interest I would like to know which one is correct or if the terms of my lease would have caused the difference in calculations.

**Sec 214**
Royalty Interest in Unit Tracts 6A and 6B: (1/6 x [1/4 - (61.298666%*1/4)]) = 0.0161253
Track Participation in Hornsilver Unit: 81.56/648.92 = 0.12568382
Royalty Interest: 0.0161253 x 0.12568382 = **0.0020267526**

**Sec 213**
Royalty Interest in Unit Tract 2: 1/6 x (1/4 -(.0785375)) = 0.02857708
Track Participation: 40.63/573.98 = 0.07078644
Royalty Interest: 0.02857708 x 0.07078644 = 0.00202287

**Sec 213 if calculated like Sec 214**
Royalty Interest in Unit Tract 2: 1/6 x (1/4 -(.0785375*1/4)) = 0.038394271
Track Participation: 40.63/573.98 = 0.070786439
Royalty Interest: .038394271 x .070786439 = .002717794

I would be appreciate anyone’s help.