Bob owns Bob's Chairs, a proprietorship, which is located in Los Angeles. Bob opened his business a year ago, and overall, it has been successful except for a recent customer, Sam Smith's Bar, who refuses to pay $5,000.00 for the 200 stools to Bob for this purchase. Bob knows he can file a small claim but is uncertain about filing a fictitious name per California law. Advise Bob after reviewing California Bus. & Prof. Code 17900 as 1) whether he must file a fictitious name and 2) any legal consequences if he fails to file one.