Category A (A):
On hourly unit (from 31 minutes to 50 minutes) = $ 500. At least.
Half hour (16 to 30 minutes) = 350 USD. At least.
About a quarter of an hour (from 1 minute to 15 minutes) = 200 USD. At least.
Category B (B):
About the hourly unit (from 31 minutes to 50 minutes) = 400 USD. At least.
Half hour (16 to 30 minutes) = $ 250. At least.
About a quarter of an hour (minutes to 15 minutes) = $ 150. At least.
Category C:
About the hourly unit (from 31 minutes to 50 minutes) = 300 USD. At least.
Half hour (from 16 to 30 minutes) = $ 200. At least.
About a quarter of an hour (minutes to 15 minutes) = $ 125. At least.
Category D (D) Gradients:
The hourly unit (from 31 minutes to 50 minutes) = 200 USD. At least.
Half hour (16 to 30 minutes) = 150 USD. At least.
About a quarter of an hour (minutes to 15 minutes) = $ 100. At least.