352 PONTIFICIAE ACADEMIAE SCIENTIARVM SCRIPTA VARIA - 28 
Assuming that the expenditures required to maintain exist- 
ing reproducible capital in a usable state amont to one-third 
of total annuel investment, and that the average amortisation 
period for these outlays is 214 years, it is easy to arrive at 
the following table (1). 
TABLE II 
+ 
[Inventories . . . 
Repair and mainte- 
nance . . - . 
Equipment (1) . . | 
structures () . . 
‘22.3 
73.0 
317.6 | 
486.8 
Total . | 1T1Q0.7 
Equipment and! 
Structures . . .] 
[077.4 
Equipment and 
Structures (Y) . .|1004.4 
R 
174.0 
2G.2 
31.8 
27.5 
262.1 
R8.4 
oz | 
C/Re 
0.70 
2.5 
Io 
25 
1.56 | 
12.18 
6 gb 
C | Re 
a % mn % 
10.2 
66.4 
6.1 
26.5 
R7.2 
11.1 
12.1 
10.4 
roo 
| 
TOO 
Ra 8 
22.6 
83.7 | 
22.5 
(!) Non-amortised value of initial installations, excluding the value of 
anv repair and maintenancv charges incorporated. 
maintenance outlays represent 1/3 of total annual investment, the amorti- 
sation period would decline from 17 to 12 years approximately. 
It can be seen from this calculation how much interest would attach to 
availability of estimates of the sums required to maintain reproduction 
capital in functioning order. 
() In allowing for repair and maintenance outlays, the elements of Re 
which correspond to equipment and structural assets respectively in Table 10 
pecome 34.1 (I—#) and 29.5 (1—#), so that the share of the value of fixed 
capital accounted for by repair and maintenance outlavs becomes 
[T0 x 34.1+25 x 29.5] # =1077.4 x. 
The corresponding share of Rg is 1077.4 x/®’, where ©’ is average amor- 
risation period for repair and maintenance outlavs. If K is the percentage 
11] Allais - pag. 156