Panzer Quest Importance of flags

1st flag cost 1 gold 2nd cost 2 gold 3rd cost 3 gold Cost of flagging 3 bases= 6 gold Cost of flagging 4 bases = 10 gold Cost of flagging 5 bases = 15 gold Cost of flagging 6 bases = 21 gold So, if you do 3 one day, then 3 the next, that is 12 gold total, instead of 21 doing them all the same day.