smc

In order to solve this problem, we can simply try both paths and finding the positive difference between the two. The first path goes $10,000\ast 0.8=8,000\ast 0.8=6400\ast 0.9=\text{5760}$ The second path goes $10,000\ast 0.6=6,000\ast 0.95\text{ or }(1-0.05)=5700\ast 0.95=\text{5415}$ The positive difference between the offers is therefore $5760-5415=\boxed{\text{textdollar}345}$