Build pricing logic with operators:
let basePrice = 100
let isPremium = true
let quantity = 3
let couponCode = "SAVE10"
let discount = isPremium ? 0.15 : (quantity >= 3 ? 0.10 : 0)
let couponDiscount = couponCode === "SAVE10" ? 0.10 : 0
let totalDiscount = Math.min(discount + couponDiscount, 0.25)
let finalPrice = basePrice * quantity * (1 - totalDiscount)
console.log(`Subtotal: $${basePrice * quantity}`)
console.log(`Discount: ${totalDiscount * 100}%`)
console.log(`Final: $${finalPrice}`)