---------------------------- money exchange --------------
    elseif msgcontains(msg, 'change gold') then
        npcHandler:say("How many platinum coins would you like to get?", cid)
        talkState[cid] = 14
    elseif talkState[cid] == 14 then
        if getCount(msg) == -1 or getCount(msg) == 0 then
            npcHandler:say("Hmm, can I help you with something else?", cid)
            talkState[cid] = 0
        else
            count[cid] = getCount(msg)
            npcHandler:say("So you would like me to change " .. count[cid] * 100 .. " of your gold coins into " .. count[cid] .. " platinum coins?", cid)
            talkState[cid] = 15
        end
    elseif talkState[cid] == 15 then
        if msgcontains(msg, 'yes') then
            if doPlayerRemoveItem(cid, 2148, count[cid] * 100) then
                doPlayerAddItem(cid, 2152, count[cid])
                npcHandler:say("Here you are.", cid)
            else
                npcHandler:say("Sorry, you do not have enough gold coins.", cid)
            end
        else
            npcHandler:say("Well, can I help you with something else?", cid)
        end
        talkState[cid] = 0