Because a large proportion of street costs are fixed,27 the unit (per piece) street cost initially declines rapidly as volume increases and continues to decline at a decreasing rate.
Street costs remain at $0.00 forever no matter what.
mnli hypothesis: Street costs remain at $0.00 forever no matter what. premise: Because a large proportion of street costs are fixed,27 the unit (per piece) street cost initially declines rapidly as volume increases and continues to decline at a decreasing rate.