Fred and George each work $8$ hours$/$day for $5$ days a week at their joke shop. Currently, they are able to sell $10$ Pygmy Puffs each throughout one workday. With this current arrangement, each brother is paid $$350/$day and overhead costs are around $$200$ per day on average. Their brother, Ron, has expressed interest in working at the joke shop full$-$time for wages of$$300/$day; they estimate that he would be able to sell $5$ Pygmy Puffs a day, but because he is a clumsy the also estimate that overhead cost will go up to $$350/$day because of breakage. By how much does the new multifactor productivity with Ron differ from the one without hiring him?

Group of answer choices

$0\mathrm{.}004$

$1\mathrm{.}223$

$0\mathrm{.}124$

$1\mathrm{.}1$

Unable to reach a conclusion