require 'pp'

# Storing all variables in a Hash so they can be printed in
# a way that shows everything related to the calculation.

x = {}

x[:task_count]            = 1_000
x[:$task]            = 0.01
x[:task_redundancy]       = 2 # How many different users must do task

x[:rate_of_mediation]     = 1.0 / 40
x[:rate_failed_mediation] = 1.0 / 20


# I use $'s in the Symbols to denote a cost value.

x[:$minimum]    = x[:$task] * x[:task_redundancy] # Minimum cost of a task
x[:$base]       = x[:$minimum] * x[:task_count]

x[:mediations]  = x[:task_count] * x[:rate_of_mediation]
x[:$mediations] = x[:mediations] * x[:$task]

x[:failed_medations] = x[:mediations] * x[:rate_failed_mediation]
x[:$failed_medations] = (x[:failed_medations] * x[:$minimum]) + (x[:failed_medations] * x[:$task])

x[:$$] = x[:$base] + x[:$mediations] + x[:$failed_medations]

puts "TOTAL COST: $%.2f" % x[:$$]
puts
pp x