I've been assigned to do a big time project by a businessman.

Here are the specs:

>>
3 primary technology sites
2 primary sales sites to promote the tecnology sites

5 secondary pages inside the primary sites
1 third page for every secondary page

8 PDF's for site design documentation

These sites include the following:
1. Folder and tab based navigation scheme.
2. Left menus and pull down navigation for another site with right information zones on home page
3. Folder tab design with "Table Columns and Rows"
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Based on these specs, I'm only charging the businessman $100 (a mere hundred). Then he asked me to reconsider my charge.

He thought I was imagining ONLY a single site to develop. But I only increased with an additional $50. Now my question is:

Is $150 enough charge for his demands?

I'm from the Philippines so I'm not really familiar with the purchasing power of the dollar. And if this charge is too low, my client would probably think I'm ludicrous and I will probably lose my credibility.