let totalInput = 0;
        let totalOutput = 0;
        day.totalCost = 0;

        for (let i = 0; i < this.events.length; i++) {
            if (day.date.getDate() === this.events[i].start.getDate()) {
                if (this.events[i].color === colors.green) {
                    totalInput = totalInput + this.events[i].amount;
                } else if (this.events[i].color === colors.red) {
                    totalOutput = totalOutput - this.events[i].amount;
                }
            }
            this.dayTotal = (totalInput - totalOutput);
            day.totalCost = this.dayTotal;
        }