Sales: ye has his own business he checks sales receipts three times a day one day his afternoon sales were $50 more than his morning sales and his evening sales were three times this afternoon so if his total sales for the day were $1000 what were his evening service

Call the morning sales x.

This means:
- The afternoon sales are x + 50.
- The evening sales are 3(x + 50) = 3x + 150

Now we can calculate x knowing the total sales:
Total sales = morning + afternoon + evening
1000 = x + x + 50 + 3x + 150
800 = 5x
x = 160

We are asked for evening sales, so let's plug are value for x into the evening expression:

evening = 3x + 150 = 3(160) + 150 = $630