Final answer:
To minimize the cost of the premiums, the company should purchase 300,000 units of Policy A and 2,000 units of Policy B, resulting in a minimum premium of $500,000.
Step-by-step explanation:
Minimum Cost of Premiums
To minimize the cost of the premiums, we need to find the number of units to purchase from each plan. Let's assume x represents the number of units from Policy A and y represents the number of units from Policy B.
From the given information, we have the following equations:
- x + y ≥ 300,000 (for the insurance)
- 50x + 100y ≥ 4,200,000 (for liability)
Now, let's calculate the minimum premium by substituting the values of x and y into the cost function:
Cost = 50x + 180y
After calculating, we find that the minimum premium is $500,000. Therefore, the company should purchase 300,000 units of Policy A and 2,000 units of Policy B to minimize the cost of the premiums.