Math Brain Teaser- Grocery Nuts and Pricing?

Question

A man went to a store and saw:

-1lbs of walnuts + 2lbs of Brazilian nuts = $2.00 a bag

- 4lbs of filaments + 1lbs of walnuts = $ 3.00 a bag

- 3lbs of almonds + 1lbs of walnuts + 1 lbs of filaments = $1.50 a bag

How much would it be if the man wants to buy a bag with:

1lbs of almonds

1lbs of Brazilian nuts

1lbs of filaments

1lbs of walnuts

Answer 1

$2

1lb filaments = $0.60

1lb walnuts = $0.60

1lb almonds = $0.10

1lb Brazil nuts = $0.70

OR

1lb filaments = $0.65

1lb walnuts = $0.40

1lb almonds = $0.15

1lb Brazil nuts = $0.80

OR

1lb filaments = $0.70

1lb walnuts = $0.20

1lb almonds = $0.20

1lb Brazil nuts = $0.90

But any of the three ways the answer is $2