Any week that you earn less than you'd get on UI, you'll get the difference. However, it can be risky. I hope that they never have you skip a week. It's a pain to have income one week and then none the next. To the UI people, it will look like you got fired, quit, maybe you asked for the week off. EDD will suspend benefits until they can determine whether you were the cause of your week with no earnings before restoring them.
EDD will allow an exclusion of $25 or 25% of your earnings whichever is more. In your case $35 and $50 times .25 is less than $25 therefore, EDD would subtract $10 to $25 from your UI check and give you the difference.
Depending on when the store closes, you might want to consider wanting until 1/6/19 to apply. It will allow your potentially much higher quarter of 7/1/18 to 9/30/18 to age into your base period. If you can go through your paystubs and bucket the money by quarter (date on the check determines the quarter to put the wages), you can decide if it's worth it to you after you use this table to calculate your weekly benefit. https://www.edd.ca.gov/pdf_pub_ctr/de1101bt5.pdf

