12 28 84 37 22 18 What is the sum of the resultant of the two rows?

Rules
(i) (2-digit odd number) + (2-digit odd number)
(ii) 2-digit even number → 2-digit perfect square odd number then, (odd number) - (Even number)
(iii) (3-digit number) ÷ (2-digit number)
(iv) (Prime number) + (Even number)
(v) (Even number) x (Even number)
Solution:
1st Row 12   28   84 ⇒ 12 x 28 = 336     [rule (v)]
⇒         336 ÷ 84 = 4 [rule (iii)]
2nd Row 37   22   18 ⇒ 37 + 22 = 59     [rule (iv)]
⇒         59 + 18 = 77 [rule (iv)]
∴ Required sum = 4 + 77 = 81