Code Cleanup on Aisle 5

refactor-nasty-ifs.js

const prices = {
  "Residential": 90,
  "Business":    150,
}

// TODO Handle no price found.
const price = numberOfRooms * prices[propertyUsage]

let discountMultiplier = 0
if (numberOfRooms >= 10) {
  discountMultiplier = .15
} else if (numberOfRooms >= 6) {
  discountMultiplier = .1
}

discountedPrice = price + (price * discountMultiplier)
discount = !!discountMultiplier ? `(${discountMultiplier*100}%)` : "No Discount Applied"

document.getElementById("tableSub").textContent = `£ ${price.toFixed(2)}`
document.getElementById("tableDiscount").textContent = `£ ${discountedPrice.toFixed(2)} ${discount}`

Thank you for your guidance Dave.
I have looked at the above code and when I run it I get an error which refers to the switch statement, Does this need to be declared elsewhere?