3.
govno_tovari = [(50, 15), (100, 8), (12, 95), (20, 70)]
def overall_price(l: list) -> int:
return sum([i * j for i, j in l])
def each_price(l: list, index: int) -> int:
return l[index][0] * l[index][1]
def overall_weight(l: list):
return sum([i for i, j in l])