$1.$ Make$-$it workshop uses a machine that can produce $100$ pieces of an item per hour & operates $12$ hours per day, $5$ days per week. The workshop expects the machine to run for approximately $95\%$ of the available time. An efficiency level of $85\%$ is planned. What is the expected weekly output of the items for this workshop? $($CO$3)($L$3)$

a$.5100$ b$.5700$ c$.4845$ d$.969$