Suppose your company imports computer motherboards from Singapore. The exchange rate is currently $1\mathrm{.}2853$ S$$/$US$$.$ You have just placed an order for $22,000$ motherboards at a cost to you of $230\mathrm{.}50$ Singapore dollars each. You will pay for the shipment when it arrives in $90$ days. You can sell the motherboards for $$192$ each.

a$.$ What is your profit at the current exchange rate? $($Do not round intermediate calculations and round your answer to $2$ decimal places, e$.$g$.,32\mathrm{.}16.)$

b$.$ What is your profit if the exchange rate goes up by $10$ percent over the next $90$ days? $($Do not round intermediate calculations and round your answer to $2$ decimal places, e$.$g$.,32\mathrm{.}16.)$

c$.$ What is your profit if the exchange rate goes down by $10$ percent over the next $90$ days? $($A negative answer should be indicated by a minus sign. Do not round intermediate calculations and round your answer to $2$ decimal places, e$.$g$.,32\mathrm{.}16.)$

d$.$ What is the break$-$even exchange rate? $($Round your answer to $4$ decimal places, e$.$g$.,32\mathrm{.}1616.)$

e$.$ What percentage rise or fall does this represent in terms of the Singapore dollar versus the U$.$S$.$ dollar? $($Input the value as a positive number. Enter your answer as a percent rounded to $2$ decimal places, e$.$g$.,32\mathrm{.}16.)$