 The n-th degree products of costs and volumes of trades, performed by economic agents during interval { \Delta } determine price n-th statistical moments.
<meaning-changed>  The n-th degree products of costs and volumes of trades, performed by economic agents during interval { \Delta } determine price n-th statistical moments.
 The n-th degree products of costs and volumes of trades, performed by economic agents during interval { \sigma } determine price n-th statistical moments.