“substantial increase”
half of it was probably being shipped overseas until Fed-X/UPS dropped flights and the only avenue left was USPS and sky-high postage put a kabosh on that.
Remember the story of the pharm in NY where the lady wanted to pay $600 for their entire stock of masks? And the pixs early on of shopping carts filled with just masks? same same with hand sanitizers and gloves. At a time we had no domestic cases
Also, there will be a lot of people buying to sell for a profit.
Have seens pics of Vendors selling masks and alcohol on the streets.
Capitalism