shop1 = sum([1, 10, 20, 30, 40, 50, 60, 70, 80, 90])
shop2 = sum([1, 12, 24, 26, 40, 24, 60, 67, 80, 101])
print('Цены на товары во втором магазине', shop1)
print('Цены на товары в первом магазине', shop2)
if shop1 < shop2:
    print('Минимальные затраты будут в 1 магазине')
else:
    print('Минимальные затраты будут во 2 магазине')

  
>>> shops = [
...     [1, 2, 3],
...     [4, 5, 6],
...     [3, 3, 3]
... ]
>>> 
>>> min_shop_sum = None
>>> for i, e in enumerate(shops, 1):
...     shop_sum = sum(e)
...     if min_shop_sum is None or shop_sum < min_shop_sum:
...         min_shop_sum = shop_sum
...         out = i, e, shop_sum
... 
>>> out
(1, [1, 2, 3], 6)
>>>

 shops = [[4, 5, 6], [1, 2, 3], [3, 3, 3]]
aim = [sum(i) for i in shops]
print (aim.index(min(aim)))