def trading_screen(**kwargs):
        global city_index
        global arms_license
        global furs_license
        global oil_license
        global wine_license
        global tradecheck
        j = city_index

        ui.hbox(yanchor=-0.28)

        ui.vbox()
        ui.textbutton("Buy beer at  %.2f " % bprices[0][j] , clicked=delta_beer)
        ui.textbutton("Buy cloth at  %.1f " % bprices[1][j] , clicked=delta_cloth)
        ui.textbutton("Buy fish at  %.2f " % bprices[2][j] , clicked=delta_fish)
        ui.textbutton("Buy grain at  %.2f " % bprices[3][j] , clicked=delta_grain)
        ui.textbutton("Buy hemp at  %.2f " % bprices[4][j] , clicked=delta_hemp)
        ui.textbutton("Buy wool at  %.2f " % bprices[5][j] , clicked=delta_wool)
        ui.textbutton("Buy iron goods at  %.1f " % bprices[6][j] , clicked=delta_goods)
        ui.textbutton("Buy ore at  %.2f " % bprices[7][j] , clicked=delta_ore)
        ui.textbutton("Buy salt at  %.2f " % bprices[8][j] , clicked=delta_salt)
        if arms_license:
            ui.textbutton("Buy arms at  %.1f " % bprices[9][j] , clicked=delta_arms)
        if furs_license:
            ui.textbutton("Buy furs at  %.1f " % bprices[10][j] , clicked=delta_furs)
        if oil_license:
            ui.textbutton("Buy oil at  %.1f " % bprices[11][j], clicked=delta_oil)
        if wine_license:
            ui.textbutton("Buy wine at  %.1f " % bprices[12][j] , clicked=delta_wine)
        ui.close()   #closes the buy vbox.

        ui.vbox() #inventory
        ui.textbutton("%s" % qbeer)
        ui.textbutton("%s" % qcloth)
        ui.textbutton("%s" % qfish)
        ui.textbutton("%s" % qgrain)
        ui.textbutton("%s" % qhemp)
        ui.textbutton("%s" % qwool)
        ui.textbutton("%s" % qgoods)
        ui.textbutton("%s" % qore)
        ui.textbutton("%s" % qsalt)
        if arms_license:
            ui.textbutton("%s" % qarms)
        if furs_license:
            ui.textbutton("%s" % qfurs)
        if oil_license:
            ui.textbutton("%s" % qoil)
        if wine_license:
            ui.textbutton("%s" % qwine)
        ui.close() #closes the inventory list

        ui.vbox()   #Sell buttons
        ui.textbutton("Sell beer at  %.2f " % sprices[0][j] , clicked=n_delta_beer)
        ui.textbutton("Sell cloth at  %.1f " % sprices[1][j] , clicked=n_delta_cloth)
        ui.textbutton("Sell fish at  %.2f " % sprices[2][j] , clicked=n_delta_fish)
        ui.textbutton("Sell grain at  %.2f " % sprices[3][j] , clicked=n_delta_grain)
        ui.textbutton("Sell hemp at  %.2f " % sprices[4][j] , clicked=n_delta_hemp)
        ui.textbutton("Sell wool at  %.2f " % sprices[5][j] , clicked=n_delta_wool)
        ui.textbutton("Sell iron goods at  %.1f " % sprices[6][j] , clicked=n_delta_goods)
        ui.textbutton("Sell ore at  %.2f " % sprices[7][j] , clicked=n_delta_ore)
        ui.textbutton("Sell salt at  %.2f " % sprices[8][j] , clicked=n_delta_salt)
        if arms_license:
            ui.textbutton("Sell arms at  %.1f " % sprices[9][j] , clicked=n_delta_arms)
        if furs_license:
            ui.textbutton("Sell furs at  %.1f " % sprices[10][j] , clicked=n_delta_furs)
        if oil_license:
            ui.textbutton("Sell oil at  %.1f " % sprices[11][j], clicked=n_delta_oil)
        if wine_license:
            ui.textbutton("Sell wine at  %.1f " % sprices[12][j] , clicked=n_delta_wine)
        ui.close() #Closes selling column.

        ui.vbox() #denominations and inventory
        ui.text("Quantity is %s" % delta)
        ui.textbutton("Quantity = 1", clicked=select_delta1)
        ui.textbutton("Quantity = 5", clicked=select_delta5)
        ui.textbutton("Quantity = 10", clicked=select_delta10)
        ui.textbutton("Quantity = 25", clicked=select_delta25)
        ui.textbutton("Return", clicked=tradechk)
        ui.close() #closes the denom list

        ui.close() #closes the grid.
    renpy.define_screen("trading", trading_screen, modal='True', tag='main')