Total productivity could be expressed two ways here based on how you express output: in units sold, or dollars of sales.
Units sold:
50,025/((652 × $7.60) + $31,550 + $15,900) = 0.95 units sold per dollar input
Dollars of sales:
(50,025 × 3.60)/((652 × $7.60) + $31,550 + $15,900) = 3.44 dollars in sales per dollar input