For this Achievement, you must follow the instructions on Paragraph 4. Whenever you are presented the option to Salvage or Throw Back Into The Alley, you MUST salvage. I would recommend not accepting any advertisements and buy all the upgrades in the office (in total it would cost $1,900). You will start with Molten Freddy, then Scrap Trap, then Scrap Baby, and finally LEFTE. I would also recommend looking up a video for any strata that could help you personally. Simply make it to the end of the week and enjoy your victory.