Convert game stats to brownlow votes

brownlow.rb

def brownlow_total(s)
  disposals = s[:kicks] + s[:handballs]
  disposal_modifier = case
                      when disposals > 40; then 10
                      when disposals > 30; then 5
                      when disposals > 20; then 1
                      else 0
                      end

  marks_modifier = case
                   when s[:marks] > 10; then 5
                   when s[:marks] > 7; then 2
                   else 0
                   end

  goals_modifier = case
                   when s[:goals] > 10; then 15
                   when s[:goals] > 6; then 8
                   when s[:goals] > 5; then 5
                   when s[:goals] > 4; then 4
                   when s[:goals] > 3; then 2
                   else 0
                   end

  clearances_modifier = case
                        when s[:clearances] > 10; then 5
                        when s[:clearances] > 6; then 2
                        else 0
                        end

  tackles_modifier = case
                     when s[:tackles] > 10; then 5
                     when s[:tackles] > 7; then 2
                     else 0
                     end

  hitouts_modifier = case
                     when s[:hit_outs] > 40; then 10
                     when s[:hit_outs] > 30; then 5
                     else 0
                     end

  return disposals + disposal_modifier + marks_modifier + s[:goals] + goals_modifier + clearances_modifier + tackles_modifier + hitouts_modifier
end