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what is the equation for price variance?
AO x AI x (AP - SP)
what is the equation for mix variance?
AO x AI x (A% - S%) x SP
what is the equation for volume variance?
(AO - EO) x SI x SP
what is the equation for efficiency variance?
AO x (AI - SI) x SP
what is the the equation for yield variance?
AO x (AI - SI) x S% x SP