The owner of a convenience store near Salt Lake City in Utah has been tabulating weekly sales at the store, excluding gas. The accompanying table shows a portion of the sales for 30 weeks. You can use EXCEL

Week	Sales
1	5494.7400
2	5632.4400
3	5413.1400
4	5613.0600
5	5498.8200
6	5610.0000
7	5388.6600
8	5281.5600
9	4929.6600
10	5113.2600
11	5140.8000
12	5528.4000
13	5216.2800
14	5177.5200
15	5027.5800
16	5335.6200
17	5097.9600
18	5018.4000
19	5073.4800
20	4986.7800
21	5163.2400
22	4821.5400
23	5213.2200
24	5492.7000
25	5136.7200
26	4965.3600
27	5137.7400
28	5461.0800
29	5118.3600
30	5310.1200

Use the 3-period moving average to forecast sales for the 31st week. (Do not round intermediate calculations. Round final answer to 2 decimal places.)

Use simple exponential smoothing with = 0.3 to forecast sales for the 31st week. (Do not round intermediate calculations. Round final answer to 2 decimal places.)

Report the performance measures for the techniques in parts a and b. (Do not round intermediate calculations. Round final answers to 2 decimal places.)