Statistics: problem 0017

For two industrial enterprises for two years, the following data are available (million rubles):

Reference period Reporting period
Cost Average balance Cost Average balance
No. of the enterprise sold circulating sold circulating
products products products products
1 480 123 510 140
2 460 55 450 60

Determine for the two enterprises as a whole the indices of fixing the working capital of variable composition, fixed composition and structural shifts. Explain the economic meaning of the calculated indicators.