| Parameter | Treatments | |||
| T1 | T2 | T3 | T4 | |
| Number of animals | 6 | 6 | 6 | 6 | 
| Purchase price of sheep (US$/head) | 14.72 | 14.72 | 14.72 | 14.72 | 
| Total grass hay intake (kg/head) | 44.75 | 45.02 | 42.19 | 44.68 | 
| Total supplement feed intake (kg/head) | 27.00 | 29.70 | 32.40 | 25.20 | 
| Total cost of grass hay (US$/head) | 1.50 | 1.51 | 1.41 | 1.49 | 
| Total cost of supplement feed (US$/head) | 4.63 | 0.85 | 3.58 | 2.11 | 
| Total variable cost (TVC in US$) | 6.12 | 2.36 | 4.99 | 3.60 | 
| Change in total variable cost (∆TVC in US$) | -3.76 | -1.14 | -2.52 | |
| Selling price of sheep (SP in US$/ head) | 22.77 | 22.53 | 22.27 | 21.52 | 
| Total return (TR in US$) | 8.05 | 7.82 | 7.55 | 6.80 | 
| Change in total return (∆TR in US$) | -0.24 | -0.50 | -1.25 | |
| Net return (NR in US$) | 1.93 | 5.46 | 2.56 | 3.20 | 
| Change in net return (∆NR in US$) | 3.53 | 0.64 | 1.27 | |
| MRR% (∆NR/∆TVC) | -93.74 | -56.06 | -50.36 | |