(B) An assigned judge assigned pursuant to division (A)(1), (A)(2)(b), (B)(2), or (C)(2) of section 1907.141 of the Revised Code shall receive reimbursement for actual and necessary expenses and a per diem compensation computed as follows:

1. (1) If the assigned judge receives compensation as described in division (A)(5) of section 141.04 of the Revised Code, thirty dollars;
2. (2) If the assigned judge receives compensation as described in division (A)(6) of section 141.04 of the Revised Code, the per diem compensation of a judge of a municipal court compensated as described in division (A)(5) of section 141.04 of the Revised Code, less the per diem compensation of the assigned judge, each calculated on the basis of two hundred fifty working days per year;
3. (3) If the assigned judge is a retired judge of a municipal or county court or a court of common pleas, the established per diem compensation for a judge of a municipal court compensated as described in division (A)(5) of section 141.04 of the Revised Code, calculated on the basis of two hundred fifty working days per year, in addition to any retirement benefits to which the assigned judge may be entitled;
4. (4) If the assigned judge is a sitting judge of the court of appeals or a court of common pleas, fifty dollars.