FORMULA




                                          365.25

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      Average Period of Breeding + Average Days Lactation + Average NPD




Where:

Average Period of Breeding: Average days of breeding of the sow(s) in the farrow realized in the period.

Average Days Lactation: Average days of lactation of the sow(s) with total weaning in the period.

Average NPD: Average of non-productive days in the period.