Prośba o przetłumaczenie kilku zdanek: angielski

Prośba o przetłumaczenie kilku zdanek: angielski

Muszę przetłumaczyć pewien artykuł, z większością sobie radzę, ale przy tych nie jestem pewny:
Your bill will show two costs - a fixed standing rate charge and the price per unit (or Kwh of energy used). (z tym już sobie sam poradziłem)
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But, some may still find that they save money switching to a fixed tariff, particularly if you've never switched and are not signed up to a duel fuel and paying by direct debit.
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You will usually pay slightly more than the cheapest deals to buy long-term security, and be careful as some do come with exit fees if you do want to leave early.
There is no guarantee fixing will be best for the long-term but it gives certainty over bills as household finances are squeezed.