Let and Const

1. Create a const named TAX_RATE set to 0.08
2. Create a let named cartTotal starting at 0
3. Create const product prices with these exact values:
   • bookPrice = 15.99
   • muffinPrice = 4.5
   • laptopPrice = 999.99
4. Add the book and the muffin to the cart by updating cartTotal (do not add the laptop for this step)
5. Create finalTotal as the cart subtotal plus 8% tax (TAX_RATE)
6. Try to reassign TAX_RATE (keep it commented after you see the TypeScript error) and export your results

Required exports

• TAX_RATE
• cartTotal
• finalTotal

Completion criteria (with the fixtures above)

• TAX_RATE is 0.08
• cartTotal is 20.49 (book + muffin only)
• finalTotal is 22.1292 (subtotal + 8% tax)

const MAX_ITEMS = 100
const API_URL = 'https://api.example.com'