OK. the ammo is about $150/1000 delivered. J&G is selling ak74s for about $350 without shipping right now.
I suggest you go buy 10 mags, something to carry them in and have fun.
I have found it is best to load up your mags at home while watching tv. When you go to the range shoot until you only have 1 or 2 full mags left. Then head home.