12 
BULLETIN 1101 U. S. DEPARTMENT OF AGRICULTURE. 
cent of the total cost. " Other costs," including depreciation on the 
herds, amounted to 30.3 per cent. This shows that calves and ma- 
nure failed by a small margin to equal the cost of labor and by a 
wide margin to balance the "other costs," including depreciation 
on the herds. 
AVERAGE COMPARED WITH BULK-LINE COSTS. 
If the net cost of producing milk on various farms is tabulated in 
an ascending scale, together with the percentage of the whole quan- 
tity of milk produced at these separate costs, one or possibly more 
points will be shown at or below which a large proportion of the 
milk is produced. The point or line of demarcation selected is called 
the " bulk " line. It is usually placed where it will include between 
80 and 90 per cent of the volume of milk produced. 
Table 10. — Net cost, quantity, and per cent of milk produced by each herd during 
two winters and two summers. 
Winter, 1919-20. 
Winter, 1920-21. 
Cost 
per 100 
pounds. 
Milk produced. 
Cost 
per 100 
pounds. 
Milk produced. 
Herd 
No. 
Quantity. 
Per cent 
of 
Cumula- 
tive 
Herd 
No. 
Quantity. 
Per cent 
of 
Cumula- 
tive 
total. 
per cent. 
total. 
per cent. 
Pounds. 
Per cent. 
Per cent. 
Pounds. 
Per cent. 
Per cent. 
608 
$2.62 
87,053 
12.0 
12.0 
617 
$2.10 
36, 640 
5.3 
5.3 
605 
2.73 
33, 431 
4.6 
16.6 
618... 
2.49 
44,824 
6.5 
11.8 
602 
2.94 
105, 963 
14.6 
31.2 
607... 
2.62 
11, 039 
1.6 
13.4 
606 
2.99 
53,315 
7.3 
38.5 
602 
2.98 
84,343 
12.3 
25.7 
603 
3.03 
3.07 
82, 615 
34, 912 
11.4 
4.8 
49.9 
54.7 
606 
2 3.02 
3.05 
612 
69, 622 
10.1 
35.8 
13.36 
619 
3.10 
31, 203 
32, 194 
50,153 
4 5 
40.3 
45.0 
52.3 
2 3.43 
613 ... 
3.25 
4 7 
616 
3.53 
42,974 
5.9 
60.6 
610 
3.41 
7.3 
610 
3.53 
48,090 
6.6 
67.2 
609... 
3.43 
35, 172 
5.1 
57.4 
614 
3.77 
45,865 
6.3 
73.5 
611 
3.44 
25, 010 
3.6 
61.0 
607 
3.88 
21, 181 
2.9 
76.4 
608 
3.55 
62, 016 
9.0 
70.0 
604 
3.88 
4.07 
60, 981 
23,634 
8.3 
3.2 
84.7 
87.9 
614... 
13.70 
3.93 
609 
51, 022 
7.4 
77.4 
613 
4.14 
41,844 
5.8 
93.7 
616... 
4.01 
46,061 
6.7 
84.1 
615 
4.20 
28,529 
3.9 
97.6 
604 
4.96 
46,418 
6.7 
90.8 
611 
5.53 
17,238 
2.4 
100.0 
615 
5.88 
23.414 
3.4 
94.2 
603 
7.95 
40,087 
5.8 
100.0 
Su: 
inner, 191S 
-20.3 
Sun 
liner, 1920- 
21.3 
610 
$1.49 
39, 749 
6.1 
6.1 
617 
$1.11 
51,326 
6.3 
6.3 
608 
1.83 
52, 016 
8.0 
14.1 
610 
1.27 
49,454 
6.1 
12.4 
606 
1.90 
43,229 
6.6 
20.7 
606 
1.32 
61,341 
7.6 
20.0 
603 
2.01 
69,523 
10.6 
31.3 
619 
1.46 
50,590 
6.2 
26.2 
616 
2.01 
41,097 
6.3 
37.6 
618 
1.53 
62,833 
7.7 
33.9 
607 
2.12 
24,997 
3.8 
41.4 
607 
1.55 
25,524 
3.1 
37.0 
612 
2.20 
29,056 
4.4 
45.8 
611 
1.79 
44,409 
5.5 
42.5 
12.40 
2.47 
602 
609 
1.92 
1.95 
71, 591 
35,066 
8.8 
4.3 
51.3 
615 
36,095 
5.5 
51.3 
55.6 
609 
2.49 
22,155 
3.4 
54.7 
616 
1.99 
56,484 
7.0 
62.6 
602 
2.52 
91,560 
14.0 
68.7 
613 
2.03 
35,940 
4.4 
67.0 
611 
2.53 
2.58 
28,423 
32,953 
4.4 
5.0 
73.1 
78.1 
608 
12.19 
2.43 
605 
65, 825 
8.1 
75.1 
613 
2.79 
54,156 
8.3 
86.4 
614 
3.13 
31,703 
3.9 
79.0 
604 
3.19 
2 3.32 
3.84 
50,343 
7.7 
94.1 
615 
603 
2 3.16 
3.38 
3.64 
39,252 
82,232 
4.8 
10.1 
83 8 
614 
38, 610 
5.9 
100.0 
93.9 
604 
4.18 
49, 475 
6.1 
100.0 
Average net cost. 
2 Average income from milk. 
s See notes to Table 1. 
