# FAQ

Many common software questions are answered in the categories below. If you can’t find a response for yours, try checking our User Forum, or, contact HelpDesk for direct assistance

 Metrix » Rates
Q: When rates change in the middle of a given billing period, how does Metrix calculate dollar amounts?

A:

When rates change in the middle of billing periods:

1. Metrix determines the percentage of the billing period that falls into each rate (the prior and the post).
2. That is, given:

 Bill Date # Billing Days Usage Demand 12/14/95 1/18/96 35 days 100 kWh 10 kW

and given a New Rate Effective 1/1/96:

Old Rate # Days = (1/1/96 - 12/14/95) = 17 days 48.6% of days in this bill go toward old rate
New Rate # Days = (1/18/96 - 1/1/96) = 18 days 51.4% of days in this bill go toward new rate

3. Metrix then applies the old and new rates to the entire bill.

Old Rate \$ = kWh * Old Rate \$/kWh + kW * Old Rate \$/kW + …
New Rate \$ = kWh * New Rate \$/kWh + kW * New Rate \$/kW + …

4. Metrix then multiplies the dollar amount given by each rate times its respective fraction as calculated in step 1.

Total \$ = Old Rate \$ * 48.6% + New Rate \$ * 51.4%

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Otherwise feel free to contact our Tech Support staff at (805) 329-6565, or via email at helpdesk@abraxasenergy.com.

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