How do you say 12 50 in spanish?

Q-monetary? as in $12.50

A-doce dolares/pesos con cincuenta centavos (12 dollars/pesos with 50 cents)

Q-floating decimal? as in 1,250

A-un mil doscientos cincuenta (1 thousand 2 hundred and 50)

Q-separate numerological values? as in 12,50

A-doce y cincuenta (12 with 50)

Q-no space between integers?

A-1250 (1250)