Advice on a bid

[bpbrab]

I have a job someone wants done in September. They have a slope in their front yard that they'd like filled in with topsoil then seeded with grass. Their front yard is 76 x 40. But this is the total seeding area. The area that needs to be filled in and leveled is 21 x 8. I've come up with a total job bid of about $1600, which includes everything. Is this an outlandish figure? Does anyone have any suggestions?
Thanks!

[PMLAWN]

Slope?? area to be level?? what are you doing.
Do you need to build a wall. How much dirt
If you are building a wall and backfilling than I think you are low
How many hours of work are you thinking and what is your material cost

[ed2hess]

This sounds very high if all you are doing is dumping a few yards of soil and putting in a seed net and sowing.