Period

Price

Number of Items Sold

Positive Feedback

Negative Feedback

Impact Factor

1

198

40

38

0

183.5121951

2

200

50

48

1

184.3137255

3

210

52

48

0

190.1886792

4

213

50

47

0

196.2941176

5

216

51

50

0

207.6923077

6

220

53

48

4

179.2592593

7

211

48

40

0

172.244898

8

200

40

30

5

121.9512195

9

180

40

26

9

74.63414634

10

176

37

30

5

115.7894737

11

170

30

26

2

131.6129032