"The formula effect generally, and particularly in the case of clothing, is dependent not just on the choice of index but also on the characteristics of the price movements and levels being measured, sample design, choice of base period and price collection methods, " said its spokeswoman Jill Leyland.

BBC: Inflation: No change to RPI calculation

The included veggies, type of pasta, marketing language around prep methods, price point, etc are all up for discussion.

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Direct operator billing will also reflect the same price points as current payment methods, ensuring a consistent user experience.

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