For the past 50 days, daily sales of laundry detergent in a large grocery store have been recorded (to the nearest 10).

Units Sold	Number of Times
30	8
40	12
50	15
60	10
70	5

1. Determine the relative frequency for each number of units sold.

2. Suppose that the following random numbers were obtained using Excel:

.12 .96 .53 .80 .95 .10 .40 .45 .77 .29

Use these random numbers to simulate 10 days of sales.