Well, you count backwards. You have 6 workouts in 2 weeks, right? The 2nd Friday, workout 6 will be 185 lbs, your max. Now, you take that, and count back in decretments of 5-10 lbs, depending on how you want to do it. Let's say you chose 10.
Workout 6 Friday - 185 lbs.
Workout 5 Wednesday - 175 lbs.
Workout 4 Monday - 165 lbs.
Workout 3 Friday - 155 lbs.
Workout 2 Wednesday - 145 lbs.
Workout 1 Monday - 135 lbs.