$100 floor for casualty loss

I would like to confirm, the $100 floor is for every time loss, or every item loss?

Thank you in advance!!!!

Question: Walter Wilson and his wife, Wilma, went shopping on May 3, 20X5, and left their coats in their locked automobile. When they returned to the car, they found that the coats had been stolen. Neither of the coats was covered by insurance. Walter’s coat had cost $300, but was worth only $150 on the date of the theft. Wilma’s coat had cost $500 and was worth $400 on the date it was stolen. The automobile was not damaged by the theft. On Mr. and Mrs. Wilson’s joint income tax return for 20X5, how much of the theft will qualify as an itemized deduction?

Correct Answer: $450

Notes: The correct answer is C. To calculate Walter’s casualty loss, take the lesser of the decrease in fair market value ($150), or the basis ($300). Walter’s starting point for the casualty loss is $150. To calculate Wilma’s casualty loss, take the lesser of the decrease in fair market value ($400), or the basis ($500). Wilma’s starting point for the casualty loss is $400.

Add Walter’s starting point of $150 to Wilma’s starting point of $400 to arrive at $550. Next, subtract $100 per casualty from the $550, which results in $450 for the itemized deduction related to the theft.