costsDiscount:
    AGE     NR
|
    PROP    NR
;

costsDiscounts:
    costsDiscounts costsDiscount
|
    costsDiscount
;

costsDiameter:
    NR ':' NR
;

costsDiameters:
    costsDiameters costsDiameter
|
    costsDiameter
;

costsSpec:
    BIOP NR
|
    DIAMETERS costsDiameters
|
    DISCOUNT costsDiscounts
;

costsSpecs:
    costsSpecs costsSpec
|
    // empty
;

costs:
    COSTS
    costsSpecs
;
