Ambiguous purchases ledger balance prevents exact working capital calculation

Steps:

• Identify initial working capital: trade receivables $10,000 minus trade payables$600 minus bank overdraft $1,600 =$7,800.
• Set off reduces trade receivables and trade payables by S = min($600, purchases ledger balance); since total payables$600, S ≤ $600, so working capital unchanged by set off.
• Create provision for doubtful debts: 5% of adjusted receivables ($10,000 - S) = 0.05 × ($10,000 - S).
• Final working capital = $7,800 - 0.05 × ($10,000 - S) = $7,300 + 0.05S (ranges$7,300 to $7,330 depending on S).

Not enough information.

Final answer: Not enough information.