Thermodynamics Part 3

A steam engine intakes 50g of steam at 100∘C per minute and cools it down to 20∘C. If latent heat of vaporization of steam is 540‌cal‌g−1, then the heat rejected by the steam engine per minute is _____× 103‌cal
(Given : specific heat capacity of water : 1‌cal‌g−1‌‌∘‌C−1 )