# Rates

When gas consumption, the consumer may choose one of two rates:

From what monthly consumption is more convenient for the customer rate B?

**rate A**- which pays 0.4 € per 1 m^{3}of gas a flat monthly fee of 3.9 € (regardless of consumption)**rate B**- which pays 0.359 € per 1 m^{3}of gas a flat monthly fee of 12.5 €

From what monthly consumption is more convenient for the customer rate B?

**Result****Leave us a comment of example and its solution (i.e. if it is still somewhat unclear...):**

**Showing 2 comments:**

**Dr Math**

we think that maybe "hacking mathematics" or "play with mathematics". All relevant domains is occupied.

#### To solve this example are needed these knowledge from mathematics:

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