$$500$ and a per loaf ingredient cost of $$0\mathrm{.}40.$

Current multifactor productivity for $640$ work hours per month $=\mathrm{.}241$ loaves$/$dollar $($round your response to three decimal places$).$

After increasing the number of work hours to $864$ per month, the multifactor productivity $=$ loaves$/$dollar $($round your response to three decimal places$).$