skunkwurks

Hey Everyone
Was hoping for some input
I have a drug test (urine test) 30 days from now for a summer job, I smoke a little under a ounce a month Im about 160 Ibs 6'0 Male.
Not really all that active (to be honest)
Anyways I really need this job to pay for school, I realize pot is fat soluable and is depended on metabolism. Do flush kits or detoxicifiers work to remove the metaboites from weed (remember I have a month)?
also is there anyway to speed up your metabolism?
So far I have been exercising 1/2 an hour each day and drinking lots of cranberry juice. I was told these things will help speed up the process.
Last summer I did the same thing and was clean when I tested on Day 37.
I was hoping to quit (as much as it sucks) because the tests are at random times during the training week, so you dont know the time or place so I think substituion and diluting may not work.
Thanks for any help
Nick