and produces 200 units of output, which it sells at $5 per unit. Firm B buys $100 worth of goods from firm A and $150 worth of goods from firm C, and produces 300 units of output, which it sells at $7 per unit. Firm C buys $50 worth of goods from firm A and nothing from firm B. It produces output worth $1,000. All other products are sold to consumers

To understand the information given, we can break it down into different firms and their transactions:

Firm A:
- Sells 200 units of output at $5 per unit, resulting in an output worth (sales revenue) of 200 * $5 = $1,000.
- Sells $100 worth of goods to Firm B.

Firm B:
- Buys $100 worth of goods from Firm A.
- Buys $150 worth of goods from Firm C.
- Produces 300 units of output, which it sells at $7 per unit, resulting in an output worth of 300 * $7 = $2,100.

Firm C:
- Buys $50 worth of goods from Firm A.
- Produces output worth $1,000.

Now, let's calculate the total sales revenue and the total output for each firm:

Firm A:
- Sales revenue: $1,000 (from selling 200 units at $5 per unit).

Firm B:
- Sales revenue: $2,100 (from selling 300 units at $7 per unit).
- Total purchases: $100 + $150 = $250.

Firm C:
- Sales revenue: $1,000 (from producing output worth $1,000).
- Total purchases: $50.

To calculate the total sales revenue and the total output in the overall market, we need to consider all firms and the consumers:

Total sales revenue in the market:
- Firm A: $1,000
- Firm B: $2,100
- Firm C: $1,000
- Total sales revenue = $1,000 + $2,100 + $1,000 = $4,100.

Total output in the market:
- Firm A: 200 units
- Firm B: 300 units
- Firm C: Not specified, so we don't know the exact quantity.

Therefore, the total output in the market is 500 units (200 + 300).

Please note that the value of output produced by Firm C ($1,000) does not match the quantities provided for the other firms. If additional information is given, we can provide a more accurate analysis.