Currency To Time converter

import easygui

winTitle = "Dollar To Time Converter"
convUnitsUp = (46, 5, 182/5, 1000, 1000, 65, 540/65, 4567/540, 3)
unitNames = ("minute(s)", "day(s)", "week(s)", "year(s)", "millenium/a", "million year(s)", "Cretacean(s)", "Cambria(s)", "Earth(s)", "Universe(s)")
oneK = "000"
divisors = (("k", oneK), ("M", oneK * 2), ("G", oneK * 3), ("T", oneK * 4))
finalString = ""
#  $ 1          = 1 min
#   46 mins     = 1 day
#    5 days     = 1 week
#  182 days     = 1 year
# 1000 years    = 1 millenium
# 1000 millenia = 1 ice age
#   65 ice ages = 1 Cretaceous
#  540 ice ages = 1 Cambrian
# 4567 ice ages = 1 Earth
#    3 Earths   = 1 Universe
currencyUnit = [-1, -1]
while currencyUnit[0] == -1 and currencyUnit[1] == -1:
    inValue = easygui.enterbox("Enter a dollar amount, followed by USD or HKD", winTitle)
    currencyUnit = [inValue.find("USD"), inValue.find("HKD")]
    for i in divisors:
        inValue = inValue.replace(i[0], i[1])
    # In any case, parse integer (or just crop off the USD/HKD!)
    print("converting {0}".format(inValue))
    currencyValue = int(inValue[:-4])
    print(currencyValue)
    if not currencyUnit[0] == -1:
        # if USD, divide by 7.8
        currencyValue = currencyValue * 7.8
        break
    elif not currencyUnit[1] == -1:
        break
j = 0
for i in convUnitsUp:
    currencyValue = currencyValue / i
    if currencyValue < 1:
        currencyValue = currencyValue * i
        break
    j = j+1
finalString = "That amount of money will buy lunch for {0} {1}.".format(round(currencyValue, 3), unitNames[j])
easygui.msgbox(finalString, winTitle)