PARIS, June 21 (Reuters) - France's newly formed New Popular Front (NPF) left-wing alliance has made campaign promises ahead of the snap parliament election that would cost an estimated 100 billion euros ($106.9 billion) in 2025, said senior alliance member Eric Coquerel on Friday.

The New Popular Front has notably pledged to reverse President Emmanuel Macron’s controversial pension reforms and to bring back the retirement age to 60.

It also aims to raise public sector wages, link salaries to inflation, boost housing and youth benefits, cut income tax and social security for lower earners, and introduce a wealth tax for the rich.

($1 = 0.9358 euros) (Reporting by Leigh Thomas and Dominique Vidalon; Editing by Sudip Kar-Gupta)