(1) Teachers holding a standard certificate valid for the subjects or grades in which the teacher is giving instruction, minimum annual salary two thousand four hundred dollars ($2400), minimum annual service increment two hundred dollars ($200), minimum number of service increments eight.

(2) Teachers holding a college certificate valid for the subjects or grades in which the teacher is giving instruction, minimum annual salary two thousand four hundred dollars ($2400), minimum annual service increment two hundred dollars ($200), minimum number of service increments ten.

(3) Teachers holding a Master's Degree and who also hold a college certificate valid for the subjects or grades in which the teacher is giving instruction, minimum annual salary two thousand four hundred dollars ($2400), minimum annual service increment two hundred dollars ($200), minimum number of service increments twelve.

(4) Teachers of applied arts and vocational subjects, two hold a standard certificate, shall be entitled to the same minimum salary and increments as teachers who hold a college certificate.

(5) Teachers of applied arts and vocational subjects, who hold a standard certificate and have earned an additional thirty semester hours of credit in professional education in the teaching field in which said teacher in engaged or related thereto, shall be entitled to the same minimum salary and increments as teachers holding a Master's Degree.

(6) Supervisors who devote one-half or more of their time to supervision of instruction holding a standard or college certificate, minimum annual salary three thousand four hundred dollars ($3400), minimum annual service increment two hundred dollars ($200), minimum number of service increments eight.

(7) Supervisors who devote one-half or more of their time to supervision of instruction holding a Master's Degree, minimum annual salary three thousand four hundred dollars ($3400), minimum annual service increment two hundred dollars ($200), minimum number of service increments ten.

(8) Principals who devote one-half or more of their time to supervision and administration and having less than twenty teachers under their supervision who hold a standard or college certificate, minimum annual salary three thousand four hundred dollars ($3400), minimum annual service increment two hundred dollars ($200), minimum number of service increments eight.

(9) Such principals who hold a Master's Degree, minimum annual salary three thousand four hundred dollars ($3400), minimum annual service increment two hundred dollars ($200), minimum number of service increments ten.

(10) Such principals having twenty or more teachers under their supervision but less than forty and who hold a standard or college certificate, minimum annual salary three thousand eight hundred dollars ($3800), minimum annual service increment two hundred dollars ($200), minimum number of service increments eight.

(11) Such principals who hold a Master's Degree, minimum annual salary three thousand eight hundred dollars ($3800), minimum annual service increment two hundred dollars ($200), minimum number of service increments ten.

(12) Provided, That the maximum salary required to be paid, under the provisions of this section, shall not exceed the minimum annual salary plus the sum of the total number of increments for the class.