あなたの前の質問に対する私の答えの延長として、これは同じように簡単です:
SELECT sum(hours_transit * load_transit) / sum(hours_transit),
sum(hours_standby * load_standby) / sum(hours_standby),
(sum(hours_transit * load_transit + hours_standby * load_standby)) / sum(hours_transit + hours_standby)
FROM table1
これが