Initial commit

elixir/freelancer-rates/lib/freelancer_rates.ex

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+defmodule FreelancerRates do
+  def daily_rate(hourly_rate) do
+    8.0 * hourly_rate
+  end
+
+  def monthly_rate(hourly_rate) do
+    22.0 * daily_rate(hourly_rate)
+  end
+
+  def monthly_rate(hourly_rate, discount) do
+    hourly_rate
+    |> monthly_rate()
+    |> apply_discount(discount)
+    |> ceil()
+  end
+
+  def apply_discount(before_discount, discount) do
+    before_discount - (before_discount * (discount / 100))
+  end
+
+  def days_in_budget(budget, hourly_rate, discount) do
+    hourly_rate
+    |> daily_rate()
+    |> apply_discount(discount)
+    |> then(fn rate -> budget / rate end)
+    |> Float.floor(1)
+  end
+end