Calculation of Gross Profit:

1. Opening Stock:
- Opening stock refers to the value of inventory at the beginning of the accounting period.
- In this case, the opening stock amount is given as $200,000.

2. Closing Stock:
- Closing stock refers to the value of inventory at the end of the accounting period.
- In this case, the closing stock amount is given as $180,000.

3. Purchases:
- Purchases refer to the cost of inventory acquired during the accounting period.
- In this case, the purchase amount is given as $850,000.

4. Carriage on Purchase:
- Carriage on purchase refers to the transportation cost incurred in bringing the purchased goods to the business premises.
- In this case, the carriage on purchase amount is given as $23,000.

5. Carriage on Sales:
- Carriage on sales refers to the transportation cost incurred in delivering the goods to the customers.
- In this case, the carriage on sales amount is given as $30,000.

6. Office Rent:
- Office rent refers to the cost of renting the office space or premises.
- In this case, the office rent amount is given as $58,000.

7. Sales:
- Sales refer to the total revenue generated from the sale of goods or services.
- In this case, the sales amount is given as $1,407,000.

Calculation of Gross Profit:

- Gross Profit is calculated using the formula:
Gross Profit = Sales - Cost of Goods Sold

- Cost of Goods Sold (COGS) can be calculated using the formula:
COGS = Opening Stock + Purchases + Carriage on Purchase - Closing Stock

- Let's calculate the COGS first:
COGS = $200,000 + $850,000 + $23,000 - $180,000
COGS = $893,000

- Now, let's calculate the Gross Profit:
Gross Profit = $1,407,000 - $893,000
Gross Profit = $514,000

Therefore, the gross profit for the given information is $514,000.