Modine Brass Corp. $($Upper M$$BC$)$ is a wholesaler that sells musical instruments to retailers. On February $1$ of the current$$ year, Upper M contracts with John $$Extravaganza$,$ Inc. $($Upper J$$EI$)$ to sell $2$ comma $000$ trumpets to Upper J with delivery scheduled for the month of February. The contract price is $ $1$ comma $000$ per trumpet.$$ However, the contract includes the possibility of a volume discount if total annual purchases exceed a given amount. These discounts are as$$ follows: