Sam Loyd's Palmistry Puzzle

A gypsy queen who ekes out a precarious existence by gathering quarters from gullible victims who want the future revealed, laments the decline of the fortune-telling industry as follows:

"The week before last I earned less than three dollars, last week only a third as much and this week somewhat less than half as much as the week before".

How much did she earn in three weeks?

(Note: an exact solution is possible, read the question carefully, RP)

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