You can buy as many drinks as you want at $1 each. You can also buy as many chocolate bars as you want at $2 each. You have $5 to spend. You must buy whole bars and drinks, that is, you cannot buy 1/2 a drink or 1/2 a chocolate.

 (a) List the combinations of drinks and bars that exhaust your $5 in a table.

 (b) Suppose that you must spend all your $5 on the drinks and bars. You would like to have as close to an equal number of drinks and bars if possible. How many bars and drinks will you consume? 

 (c) Suppose now that you do not have to spend all your $5, that is, you may have some change left over. You want to consume drinks and chocolate bars only in equal amounts, i.e., 1 bar and 1 drink, or two bars and two drinks, etc., but you will consume as much as your budget allows. Given these wants, how much chocolate and drinks will you consume? How much money do you have left over?