Sunshine Ltd signed a $$720,000$ contract on $20$ April $2020$ with Queen and Co$.$ to design and install a cold room. $80\%$ of the contract price is for the equipment, $15\%$ are installation charges while the balance is for one year maintenance charge which will be carried out every six months. Queen and Co$.$ paid $10\%$ of the contract price upon signing of the contract while the balance will be settled once the installation and testing were completed in June $2020.$ Cost for the equipment is $$520,000.$

Provide complete information for each revenue related situation. Prepare the necessary journal entries, show all calculations following IFRS $15$ Revenue