Gene's math homework question

I rewatched S14E11 Mission Impossi-Bob, and decided to try to solve Gene's homework problem. Granted, it has been several years sinve I've been in school and had to do word problems, but I wanted to check if Bob's answer at the end of the episode was right (and I didn't trust Linda's trusty "FOUR" answer).

Question: A hat salesman named Peter sells two hats every 20 minutes for $29 each. The store is open from 10am - 5pm. On Wednesdays Peter sells 8 times the amount of hats. What percentage of weekly hat sales does Peter make on a Tuesday?

2 hats every 20 minutes simplified to 1 hat every 10 minutes = 6 hats per hr

7 hrs per day x 6 hats per hr = 42 hats per day

Wednesday = 42 hats * 8 = 336 hats

It wasn't clear to me how many days a week the shop is open, so I did two options.

Days per week Only M-F: (42 hats * 4 day) + (336 hats on Wednesday) = 168 + 336 = 504 hats sold M-F

Open all week: (42 hats * 6 days) + (336 hats on Wednesday) = 252 + 336 = 588 hats sold all week

Tuesday hat sales Only M-F: 42 hats/504 total hats = 0.083 x 100 = 8.33%

All week: 42 hats/588 hats sold all week = 0.0714 x 100 = 7.14%

Some silly fun, but I enjoyed it! Feel free to check my work.