Ah, nice to see someone here plays SWAT 4. It's one of my favorite games. The main area of the store is often tricky to deal with. For this map, I usually carry CS because flash bangs don't always affect suspects behind cover. You could enter the building from the back door near the bathrooms so that you can avoid the office window so that you won't be spotted by any suspects that might be in the main shopping area. Once inside the building, I wedge the two doors on the right, wedging the main area door and the door leading to the lounge. I usually mirror those doors myself and see what's inside of those areas before going to the office. Then I gas and clear the office and proceed to the freezer. Once in the freezer, watch the windows on the right and stack up on the door if it's safe to do so. If you see any suspects near the wedged doors and there aren't any suspects near the freezer door, then it might be best to enter and gas from the other doors depending on where the suspects are located. Single player games on SWAT 4 can be tricky and frustrating at times since your teammates are AIs. Co-op with a great team of human players beats the AI team any day. That's why it's my favorite mode to play in. Good luck with your Quik Fuel mission.