Answer
Company A pays $\$ 1400$ more.
Work Step by Step
We know that $a_n=a_1+(n-1) d$
Here, we have $a_{10}=24,000+1600(10-1)=38,400$
and $b_{10}=28,000+1000(10-1)=37,000$
Thus, it has been seen that $a_{10} \gt b_{10}$
Now, $a_{10}-b_{10}=38,400-37,000=1400$
Thus, Company A pays $\$ 1400$ more.