I need help understanding how to calculate the second journal entry. Could you possibly post a step by step explanation on how to get that number please.

the month of July: (Click the icon to view the records.) Read the record, calculate the quantity and total cost of inventory purchased, sold, and on hand at the end of the period. (Enter the oldest inventory layers first.) Data table July 7: Purchased 15 cameras for $100 per camera. Data table July 11: Sold 16 cameras. Begin by joumalizing the revenue from the sale of cameras on account. (Do not journalize the cost related to the sale yet. We will July 11: Sold 16 cameras. Now joumalize the cost of the cameras sold