Rammstein Item Classification

--EITHER nHave OR nWant HAVE TO BE OVER 10 TO BE USED UNLESS THE OTHER IS ZERO!
nHave = 14 --How many Discogs users have this release.
nWant = 73 --How many Discogs users want this release.
nMade = 500 --How many of this release were made (don't know? leave it at 0.)

ENUM_COMPARATIVE = 10000
ENUM_CATFOUR = 100
ENUM_CATTHREE = 80
ENUM_CATTWO = 60
ENUM_CATONE = 11
ENUM_CATX = 6

function fcExecuteCalculation()
    local sFinal = ""
    local iDiscogsNum = 0
    local iDispatchNum = 0
    local iCombined = 0
    if not(nHave == 0 or nWant == 0) then
        iDiscogsNum = (nHave/nWant)*100
    elseif nHave == 0 and nWant ~= 0 then
        iDiscogsNum = 1/(1+math.exp(-nWant))*-100
    elseif nHave ~= 0 and nWant == 0 then
        iDiscogsNum = 1/(1+math.exp(-nWant))*100
    end

    if nMade == 0 then --Meaning we don't know how many were created.
        iDispatchNum = (nMade / ENUM_COMPARATIVE)*100
    end

    iCombined = iDispatchNum + iDiscogsNum

    if iCombined >= ENUM_CATFOUR then
        sFinal = "Category 4"
    elseif iCombined >= ENUM_CATTHREE and iCombined < ENUM_CATFOUR then
        sFinal = "Category 3"
    elseif iCombined >= ENUM_CATTWO and iCombined < ENUM_CATTHREE then
        sFinal = "Category 2"
    elseif iCombined >= ENUM_CATONE and iCombined < ENUM_CATTWO then
        sFinal = "Category 1"
    elseif iCombined >= ENUM_CATX and iCombined < ENUM_CATONE then
        sFinal = "Category X"
    end

    return sFinal
end

print(fcExecuteCalculation())