Question 1101342
[ cost/name ] = [ total cost ] / [ number of games ]
{{{ c }}} = cost/game
{{{ c = 21 / 4 }}}
{{{ c = 5.25 }}}
$5.25 is the cost/game
( the $5 for shoes is included in the $21,
but I think it has to be included in the 
cost/game )
Get another opinion if needed