Is this better?
Do 10 rv = 4,10,2
Do 20 T4 = 1620, 2700, 360
Do 30 regN = 0, .95, .05

I need it to do all combinations for
rv: 4, 6, 8, 10
T4: 1620, 1980, 2340, 2700
regN: 0, .4, .5, .6, .7, .8, .9, .95