Contribute correction: 1987 belastingprogramma

  _  _      ___      ______   _    _   
 | \| ||   / _ \\   /_   _// | || | || 
 |  ' ||  | / \ ||  `-| |,-  | || | || 
 | .  ||  | \_/ ||    | ||   | \\_/ || 
 |_|\_||   \___//     |_||    \____//  
 `-` -`    `---`      `-`'     `---`