A research analyst is trying to determine whether a firm's price-earnings (PE) and price-sales (PS) ratios can explain the firm's stock performance over the past year. A PE ratio is calculated as a firm's share price compared to the income or profit earned by the firm per share. Generally, a high PE ratio suggests that investors are expecting higher earnings growth in the future compared to companies with a lower PE ratio. The PS ratio is calculated by dividing a firm's share price by the firm's revenue per share for the trailing 12 months. In short, investors can use the PS ratio to determine how much they are paying for a dollar of the firm's sales rather than a dollar of its earnings (PE ratio). In general, the lower the PS ratio, the more attractive the investment. The accompanying table shows a portion of the year-to-date returns (Return in %) and the PE and PS ratios for 30 firms.

Firm	Return	PE	PS
1	4.6	14.36	2.41
2	-4.3	11.01	0.78
3	5.9	11.97	2.24
4	4.9	11.29	1.37
5	-11.2	9.84	1.82
6	20.6	15.65	0.84
7	64.2	16.05	1.59
8	18.7	8.98	1.03
9	-15.4	11.35	2.75
10	48.2	13.77	1.46
11	7.5	11.49	1.21
12	20.9	14.35	1.33
13	-18.3	8.2	0.84
14	2.9	9.49	2.65
15	12.2	11.21	1.96
16	-3.8	12.68	2.77
17	2.1	9.71	1.99
18	16.2	13.46	1.13
19	23.1	14.95	3.37
20	-1.2	8.97	2.4
21	-8.3	10.53	3.68
22	-3.6	7.89	2.22
23	15.8	16.38	4.58
24	21.3	16.27	0.86
25	6	15.09	2.32
26	11.6	9.17	0.99
27	13.8	14.94	1.39
28	15.8	15.58	0.9
29	0.9	12.58	0.46
30	16.3	13.94	1.98

Estimate: Return = ₀ + ₁PE + ₂PS + . (Negative values should be indicated by a minus sign. Round your answers to 2 decimal places.)

What is the predicted return for a firm with a PE ratio of 10 and a PS ratio of 2? (Negative value should be indicated by a minus sign. Do not round intermediate calculations. Round final answer to 2 decimal places.)

What is the standard error of the estimate? (Round your answer to 2 decimal places.)