James spends $10 on supplies for a lemonade stand and sells $30 worth of lemonade What was his profit?

$20

To calculate James' profit, we need to subtract his expenses from his revenue.

1. Revenue: James sells $30 worth of lemonade.
2. Expenses: James spends $10 on supplies for the lemonade stand.

To find the profit, subtract expenses from revenue:

Profit = Revenue - Expenses

Profit = $30 - $10

Profit = $20

Therefore, James' profit from the lemonade stand is $20.

To determine James' profit, we need to calculate the difference between the total amount he earned and the total amount he spent.

1. Total Spent: James spent $10 on supplies.
2. Total Earnings: James sold $30 worth of lemonade.

To find the profit:
Profit = Total Earnings - Total Spent

Substituting the values:
Profit = $30 - $10
Profit = $20

Therefore, James' profit from the lemonade stand is $20.