I am bored with my studies, please motivate me.

At a price of books will be both supplied and demanded. $10 $20 $30

Tu es venalicius; tu servos in foro (vendo,vendis,vendit)

Take a look at this dictionary entry. contest con • test (n.) kon-test [from anglo-french or latin] 1. a competition between rivals for a prize 2. a struggle for victory 3. a dispute; controversy (v.) kuhn-test 4. to fight for in a battle 5. to call into question