commission1 = 5
commission2 = 7
def checkNum(num):
if (num - num*commission1/100 - num*commission2/100) % 10 == 0:
return True
def getMaxValidSum(sum):
for i in range(sum, 0, -1):
if checkNum(i):
return i
print("Недостаточно средств для списания.")
print(getMaxValidSum(983))