178 Replace Temp with Query

//FROM
const basePrice = this._quantity * this._itemPrice;
if (basePrice > 1000)
    return basePrice * 0.95;
else
    return basePrice * 0.98;

//TO
get basePrice() {this._quantity * this._itemPrice;}

...

if (this.basePrice > 1000)
    return this.basePrice * 0.95;
else
    return this.basePrice * 0.98;