Final answer:
The estimated bad debt expense is $35,750.
Step-by-step explanation:
To calculate the estimated bad debt expense, we need to find 1.25% of sales.
First, we calculate the bad debt allowance by multiplying sales by 1.25%:
Sales * 1.25% = $3,420,000 * 1.25% = $42,750
Next, we determine the allowance for doubtful accounts by subtracting the debit balance of $7,000:
$42,750 - $7,000 = $35,750
Therefore, the estimated bad debt expense is $35,750.