Subway, prewashes, cuts, garnishes, and distributes a variety of salad mixes in $2-$pound bags. The shop owner, Ninja, is considering a new Hi$-$Speed shredder to replace the old machine, referred to in the shop as "Stylo." Hi$-$Speed will have a fixed cost of Rs $85,000$ per month and a variable cost of Rs $1\mathrm{.}25$ per bag. Stylo has a fixed cost of only Rs $44,000$ per month, but a variable cost of Rs $1\mathrm{.}75.$ Selling price is Rs $2\mathrm{.}50$ per bag. $($a$)$ What is the crossover point in units $($point of indifference$)$ for the processes? $[2$ Marks$]($b$)$ What is the monthly profit or loss if the company changes to the Hi$-$Speed shredder and sells $60,000$ bags per month? $[3$ Marks$]($c$)$ What