From the question stem:
Cost of producing x units = kx + t, therefore cost of producing 1000 units = 1000k + t.
Revenue from sale of 1 unit = k + 60, therefore revenue from sale of 1000 units = 1000(k + 60) = 1000k + 60,000.
Profit = 1000k + 60,000 - 1000k - t
= 60000 - t.

To reach this value we need t.

Stmt1:
1000(k + 60) = 150,000
=> k + 60 = 150.
=> k = 90.
Still we have no information to determine t. Hence insufficient.

Stmt2:
500k + t + 45000 = 1000k + t
=> 500k = 45000
=> k = 90.
Again, no information about t. hence insufficient.

Combining both, adds nothing to the information available.

Hence answer should be E.

What is the OA ??

same logic same answer - E

oa E