Calculation of Revenues:
There is a series of four calculations that
are run on each commodity on each delivery. They must be done in the
order listed in this chart. The total revenue for the run is
determined by adding the results of the calculations below for each
commodity. To that will be addad any station-specific modifiers such
as restraunt/hotel income for passenger deliveries.
Variables:
DIST = # squares between stations (* .5 if E. USA or
England)
DISTB and DISTC = Interim variables in formulas SPEED =
Mph/2.5 (i.e. 20mph = speed of 8) CLASS = 0 for Ma, 1 for Passenger,
2 for Fast Freight, 3 for Slow Freight and 4 for Bulk Freight)
DIFF = Difficulty level (0 for investor ... 3 for Tycoon)
REVENUEA = Interim variable in formula
FIRST YEAR = The first year of the
scenario
REVENUE = Revenue for cargo
Calculation #1: Effect of Distance
DISTB = DIST*(5 - CLASS) + (40*(CLASS+1))
Calculation #2: Effect of Speed
DISTC = (DISTB/8)*(SPEED + (2*CLASS^2) / (((YEAR-1790)/10) + (2*CLASS^2))
Calculation #3: Effect of Year
REVENUEA = TONS*2*DISTC / (YEAR - (1170 + (FIRST YEAR/3)))
Calculation #4: Effect of Difficulty Level
REVENUE = REVENUEA * (7 - DIFF) / 6
I've found these formulas here and here,both quoting "The Official Guide to Sid Meier's Railroad Tycoon" as their source.
railroad-tycoon-2
tag because a tag for the first one didn't exist. I created that tag for you and retagged the question. – DJ Pirtu Aug 26 '15 at 9:11