Definition: In this task, you need to generate an appropriate title for the given summary of some paragraph. The generated title must be short and should include the main topic of the given text. Your summary should be less than 20 words long.
Input: Labour's shadow chancellor John McDonnell says the Conservatives' failure to curb bills has cost the average household an extra £5,949 a year since 2010. But how has Labour arrived at this figure and do their sums add up?

General election: Labour's £6,000 bill claim fact-checked