A factory has installed a new process that will produce an increased rate of revenue (in thousands of dollars per year) of R (t) = 200 - 0 .5 ett1 where t is time measured in years. The new process produces additional costs (in thousands of dollars per year) at the rate of C(t) = 2 ett1 Find the net total savings. Note: Round up all the decimal numbers in all the steps not just the final answer. Example: if you get (3+1.005 = 3+2 = 5) or (50 + 1.5= 50+2 = 52) round it up to 2 in any step of the calculations. (a) 4 O b) 170 c) 435 O d) 536 O e) 763