Gas Nail Gun Why Do You Have To Be 18 To Purchase Certain Items?

Why do you have to be 18 to purchase certain items? - gas nail gun

When scanning certain items in the registry, the message to the client 18 is 3/9/91. The "18" question will appear each time I scan the following:

Automotive chemicals (oil, treatment and sealants)
Equipment (power tools, nail guns, electric grinders, milling machines, paint)
Budget
Electric Knives, cutting blades, gas mixtures
Delsym, Sudafed, Tylenol

What happens if I ignore the message and continue?