In the other two training sessions they did 6 total sets of heavy squats without doing jump squats or vice versa, 6 sets of jump squats without doing heavy squats. (fitnessandpower.com)
By now you should be able to finish your reps in less total sets. (fitnessandpower.com)
Regarding total sets, there's no hard and fast rule, or range, of what's the correct amount. (kingofthegym.com)