If a workout is graded as For Time, the goal is to perform the specified amount of work as soon as possible (AFAP).
The ranking "For Time" workouts is calculated as the cumulative amount of minutes and seconds (e.g. 08:15) on the clock when the last rep of the exercise is done.
There is no prescribed weight for the Sandbag Hold. Use whatever is available and as heavy as possible. Continue with the pattern, adding 2 Burpees every round.