At the end of the calendar year 20x7, the allowance for doubt- ful debts account is 2.5% of the trade receivables of 40,000 on that date. During the year 20x8, bad debts of 2,500 were written off. At the end of calendar year 20x8, the allowance for doubtful debts is required to be 2.5% against receivables of 48,000. In the year 20x9, bad debts of 100 are to be written off. At the end of calendar year 20x9, an allowance of 0.8% against receivables of 87,500 is required. REQUIRED: Record the above transactions using T-accounts.