I hope you get at least 3 females, You're box looks pretty ideal for 4 or so females. Or are you one of those people who flowers one female, taking an eternity bending and vegging their plant, but then supercrops the thing for like 3 oz's in the end. If you did want 4 females you should plant at least 7 seeds. Some could die, or you just happen to get lots of males.

Although when I flower a bag of 10 seeds I usually get around 7 females, so it's likely you'll get more females than male. If you get mostly males you know you probably messed up.