Acompany sells boxes of duck calls (d) for $35 and boxes of turkey calls (t) for $45. they make batches of duck calls that fill 6 boxes and batches of turkey calls that fill 8 boxes. the company only has 42 boxes. which system of equations the company plan to make $300?

6d = 42 - 8t
35d + 45t = 300

d = 42 - t
6d + 8t = 42

d = 42 - t
35d + 45t = 300

6d = 42 - 8t
35d - 45t = 300