data
structure
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list
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alloc
structure
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integer
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2
1
2
2
1
1
2
2
2
2
2
1
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1
2
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1
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2
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character
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0
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class
character
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factor
cost
numeric
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120.7
171.61330000000001
171.86170000000001
201.33600000000001
210.31999999999999
212.01329999999999
214.352
228.19329999999999
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334.54669999999999
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row.names
character
31
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
class
character
1
data.frame