Lua Can someone help to add something to my script?

[Szymski]

Hello, i need a perfect upgrade stone for my upgrade system, for example if i wanna upgrade my item i need items with id like 5878 and 5879 with 75% chance to upgrade, i need something like this > I need this 2 items for upgrade with 75% chance OR i need other item with id 1234~~ with 100% chance to upgrade, can someone help me? My script is here:

<?xml version="1.0" encoding="ISO-8859-1"?>
<upgrades>
    <items>
        <itemupgrade value="2345"/>
    </items>                                                                   
    
                                                                                <!-- Bronie -->
    <upgrade itemid="2390;2392;2393;2396;2397;2403;2404;2411;2412;2413;2402;2418;2442;2438;7383;7390;7391;7416;7406;7384;2405;2395;7402;2406">
        <attribute key="attack" value="2" upgradeLevel="0" upgradeChance="75">
            <item id="5878" count="10"/>
            <item id="5879" count="5"/>
        </attribute>
        <attribute key="attack" value="5" upgradeLevel="1" upgradeChance="70">
            <item id="5880" count="10"/>
            <item id="5882" count="10"/>
        </attribute>
        <attribute key="attack" value="7" upgradeLevel="2" upgradeChance="60">
            <item id="4851" count="10"/>
            <item id="5886" count="10"/>
        </attribute>
        <attribute key="attack" value="10" upgradeLevel="3" upgradeChance="55">
            <item id="5887" count="15"/>
            <item id="5468" count="15"/>
        </attribute>
        <attribute key="attack" value="15" upgradeLevel="4" upgradeChance="50">
            <item id="5942" count="2"/>
            <item id="5881" count="10"/>
        </attribute>
        <attribute key="attack" value="20" upgradeLevel="5" upgradeChance="40">
            <item id="5941" count="2"/>
            <item id="5883" count="5"/>
        </attribute>
        <attribute key="attack" value="25" upgradeLevel="6" upgradeChance="30">
            <item id="6103" count="15"/>
            <item id="8977" count="5"/>
        </attribute>
        <attribute key="attack" value="30" upgradeLevel="7" upgradeChance="25">
            <item id="5876" count="5"/>
            <item id="5089" count="10"/>
        </attribute>
        <attribute key="attack" value="35" upgradeLevel="8" upgradeChance="20">
            <item id="8978" count="5"/>
            <item id="6500" count="15"/>
        </attribute>
        <attribute key="attack" value="50" upgradeLevel="9" upgradeChance="10">
            <item id="8979" count="15"/>
            <item id="5943" count="3"/>
        </attribute>
    </upgrade>           
    
    
    <!-- zbroje -->
    <upgrade itemid="2342">
        <attribute key="armor" value="2" upgradeLevel="0" upgradeChance="75">
            <item id="5878" count="10"/>
            <item id="5879" count="5"/>
        </attribute>
        
    </upgrade>           
            

    
</upgrades>