end time the same for all 3 daes, so werk onit first
14:50 -12:00=2 ours & 50 min=170 minuts
yu du this 3 daes, so it add up tu 3*170=510 minuts
dae 1..start=8:15, so time til noon=3 ours+45 min=225 minuts
dae 2...start=9:00, time=3 ours or 180 minuts
dae 3...start=8:20, time=3 ours+40 min=220 minuts
add 3 daes (morning)...225+180 +220=625 minuts
510+625=1135 minuts
=18.916 ours
18*60=1080 minuts
1135-1080=55 minuts
time=18 ours+55 minuts