A greeting card company incurred the following costs associated with running its business last month: cardstock (thick paper), \$9,820; ink, stickers, ribbons, and other card attachments, $7,520; rent on office space, $1,420; rent on factory space, $2,320; office salaries, $5,220; factory labor, $8,920; and advertising, $870. How much were its total product costs last month? Total product costs $ How much were its total period costs last month