function demo(arr){
    let sum = 0;
        for(let i = 0; i < arr.length; i++){
            let split = arr[i].split(", ");
            let availableAmount = +split[0];
            let sugar = split[split.length - 1];
            let cost;
            if(split.includes("coffee") && split.includes("caffeine")) {
                    cost = 0.80;
                        if(split.includes("milk")){
                            cost = +cost + +(cost * 0.1).toFixed(1);
                        }
                        if(sugar > 0){
                            cost = +cost + 0.1;
                        }
                        let change = Math.abs(cost - availableAmount);
                        if(cost <= availableAmount) {
                            sum = +sum + +cost;
     console.log(`You ordered coffee. Price: ${cost.toFixed(2)}$ Change: ${change.toFixed(2)}$`);
                        }else {
     console.log(`Not enough money for coffee. Need ${cost.toFixed(2)}$ more.`);
                        }
            } else if(split.includes("coffee") && split.includes("decaf")) {
                    cost = 0.90;
                    if(split.includes("milk")){
                        cost = +cost + +(cost * 0.1).toFixed(1);
                    }
                    if(sugar > 0){
                        cost = +cost + 0.1;
                    }
                    let change1 = Math.abs(cost - availableAmount);
                    if(cost <= availableAmount) {
                        sum = +sum + +cost;
 console.log(`You ordered coffee. Price: ${cost.toFixed(2)}$ Change: ${change1.toFixed(2)}$`);
                    }else {
 console.log(`Not enough money for coffee. Need ${cost.toFixed(2)}$ more.`);
                    }
            } else if (split.includes("tea")){
                cost = 0.80;
                if(split.includes("milk")){
                    cost = +cost + +(cost * 0.1).toFixed(1);
                }
                if(sugar > 0){
                    cost = +cost + 0.1;
                }
                let changeTea = Math.abs(cost - availableAmount);
                if(cost <= availableAmount) {
                    sum = sum + +cost;
console.log(`You ordered tea. Price: ${cost.toFixed(2)}$ Change: ${changeTea.toFixed(2)}$`);
                }else {
console.log(`Not enough money for tea. Need ${changeTea.toFixed(2)}$ more.`);
                }
            }
        }
        console.log(`Income Report: ${sum.toFixed(2)}$`);
}