I cannot get test 43 to work.   The costs are [3, 17, 57] and the offical answer is 170.    The only combinations that can achieve this are 10*week or (7*week + 17*day).   Neither of these seem correct.    I get the minimum as 174, ie (3*month + 1*day).   Can anyone reproduce the offical answer?

I cannot get test 43 to work.   The costs are [3, 17, 57] and the offical answer is 170.    The only combinations that can achieve this are 10week or (7week + 1