Strike grains with 24.47 L of water at 80,5 °C.
Mash at 68 °C for 75 min.
Vorlauf and lauter 15.37 L in your first runnings.
Add 20.63 L of sparge water at 75.5 °C.
Vorlauf and lauter 20.63 L in your second runnings.
Your combined runnings should be 36 L.