craftkit program

from random import randint
calc = []
winnings = [0]*5
maxit = 5000
rolledfour = False
for skill in range(1,5):
    it = 0
    for price in range(0,11):
        mod = skill
        if price <=2.5:
            mod-=0
        elif price <=5:
            mod-=1
        elif price<=7.5:
            mod-=2
        elif price<=10:
            mod-=3
        #don't try crafting if it's too hard
        if mod>=-1:
            calc = []
            for i in range(0,maxit):
                it += 1
                #first item
                roll = randint(1,6)
                roll+=mod
                if roll>=5:
                    winnings[skill]+=price
                elif roll == 4:
                    rolledfour = True
                #second item
                if rolledfour:
                    roll = randint(1, 6)
                    roll += mod
                    if roll >= 5:
                        winnings[skill] += price
                    elif roll == 4:
                        winnings[skill] += price/2.
                else:
                    roll = randint(1, 6)
                    roll += mod
                    if roll >= 5:
                        winnings[skill] += price
                    elif roll == 4:
                        winnings[skill] += 0
                rolledfour = False
    if it>0:
        winnings[skill] = winnings[skill] / it
    else:
        winnings[skill] = 0
    print("handiwork +"+str(skill)+" gives a winning of "+str(winnings[skill]))
print("which gives an average of ")
print((winnings[1]/5. + winnings[2]/15. + winnings[3]/30. + winnings[4]/50.)/(1./5. + 1./15. + 1./30. + 1./50.))