What is the differential setting of an automatic pressure control that turns the burner ON at 80 psi and OFF at 105 psi?

△S = P1 - P2
                      S = P1-P2
                      S = 105 - 80
                      S = 25
Where,
                      △S differential setting delta
                      P1 cut-out pressure delta
                      2 cut-in pressure delta