100,000+4,000+800+5100, comma, 000, plus, 4, comma, 000, plus, 800, plus, 5 in standard form.

Which product is positive a is 2/5 -8/9 -1/3 -2/7 b is -2/5 8/9 -1/3 -2/7 c is 2/5 8/9 1/3 -2/7 d is -2/5 -8/9 1/3 2/7

Is this a polynomial function? i need to know asap

Due to financial difficulties the owner of 4 skateboard stores is going to close 2 of his stores. based on the money earned at each store, which two stores should remain open?