Final answer:
The original budget amount was the total of marketing and other expenses, which is $700.
Step-by-step explanation:
If you spend all of your original budget and earn revenue of $1,000, incur marketing expenses of $200 and all other expenses of $500, the calculation of the original budget would essentially be the sum of all expenses plus the revenue.
Since the revenue is money earned, not a part of the budget for expenses, it should not be added to the budget.
Therefore, the original budget amount would be the total amount spent on expenses, which is the sum of marketing expenses and all other expenses. Considering this, the original budget was $200 for marketing and $500 for other expenses, totaling $700.