Tools and Calculators Enhanced ROI Calculator for Sheep ROI Calculator For Sheep 1. Your Flock How many ewes on hand at the start of the season? What are your operating costs per ewe? Target lambs weaned per ewe (%): What are lambs worth ($)? What are ewes worth ($)? 2. DSE Rating These default settings can be used as a guide or adjusted as required. Adult equivalent rating - lambs: Adult equivalent rating - ewes - twinners: Adult equivalent rating - ewes - mixed: Calculate Results Category Target You DSE Rating Category Target You What-If Scenarios Total Ewes: Lambs Weaned (Target Weaning Percentage): Total Potential Revised DSE: Total Potential Increased Profit (Per Year):