Q. Jack runs a baseball card shop. Linda, who knows little or nothing about baseball or baseball cards, agrees to run the shop for Jack while he went out for dinner. Jack provides Linda the following instructions:

1. She may sell any card for the price marked on the card.

2. Pointing to a case containing the more expensive cards, he tells her which he might negotiate the price on those cards if the consumer needs to wait until he returns. Shortly after Jack left, Linda sold Billy, a 10yearold little league player, an Ernie Banks rookie card for $12. The card bore a sticker on the back which read "1200." Billy apparently was unaware of the card's true value also did not try to negotiate its price.

Did Linda have express, implied, or apparent authority to sell the card for $12?