Answer: Firm A will spend $4,000.
Explanation: Daily chemical dumps into the river firm A & B = 50ton.
i. Firm B clean-up cost before it gets the the river = $50/ton.
= $50 x 50tons = $2500.
ii. Government polution rate $75/ton
= $75 x 40(permits) = $3000
Firm B clean-up is less than the cost of pollution permits with $500. Cleaning up it's pollution would be best since it's the cheaper alternative..
Firm A cleanup cost per ton ($100/ton).
= $100 x 50tons = $5000
ii. Government polution rate $75/ton
= $75 x 40(permits) = $3000.
Firm A clean-up is greater than the cost of pollution permits with $2000. Cleaning up it's pollution would cost more. So purchasing of permits would be best.
iii. Purchasing 40 pollution permits
= $100 x 40
= $4000.