willy wonka sells a variety of chocolates for living. among
his best sellers are ureu,hershey,guys and kenji. the unit prices for each
variety are as follows $1, $2, $3 and $4 respectively. The number of keiji bars
is equal to the number of guya bars as well as ureu, while ureu bars is twice
as many as tershey bars. if the total sales results to $90