FIFO Inventory Valuation for Gross Profit The provided data for purchases and sales is ambiguously formatted, making exact unit counts and timings unclear.

Steps:

• Identify purchases: Jan 3 (units and price unclear), Jan 13 (at $200 each, units unclear), Jan 28 (3 at$200 each).
• Identify sales: Likely Jan 13 (possibly 2 at $400 each) and/or Jan 28 (2 at$400 each), but totals uncertain.
• Apply FIFO: Cost of goods sold uses earliest purchase costs first.
• Calculate gross profit: Total sales revenue minus COGS.

Not enough information to compute gross profit definitively.

Final answer: Not enough information.