Answer: The quantity supplied likely goes down.
In economics, an increase in price leads to a decrease in quantity supplied, holding all other factors constant. This relationship is known as the law of supply, which states that a higher price leads to an increase in quantity supplied and a lower price leads to a decrease in quantity supplied, ceteris paribus.
When the price of t-shirts rises from $12.00 to $13.00, the increase in price reduces the quantity of t-shirts that producers are willing and able to supply. Producers will be less incentivized to produce as many t-shirts at the higher price, so the quantity supplied goes down.
Explanation: