Eli is a landscaper who builds patios and decks for his customers. suppose he purchases $1200 of patio stones for a project and hires employees to build the patio at a cost of $800 in wages. he also uses his own talents in designing the patio and his talent is worth $500. he charges his customer $3500 for the finished patio. using the income approach, eli has created _____ of gross domestic product.