A Mother has

send (?) her three daughters to sell

totally 90 eggs on market.

"Totally"? . . . I must assume this mean they sell all 90 eggs.
She gave

her oldest and

most (?) brightest daughter 10 eggs,

second of them 30 eggs, and

the third daughter 50 eggs.

This wasn't too bad . . .
Then she said to them:

. . . and the language gets worse . . .
"First all of you agree upon

a price for which you will

make sell (?)
and stick to that price no matter what.

This indicated that they agreed on a common price for the eggs.
But I hope that

mine (?) oldest and

most (?) brightest daughter will,

*beside general agreement on price among all of you,* What does that phrase mean?
succeed in getting as much money for her 10 eggs as

**her** second daughter for her 30 eggs

Whose second daughter? . . . The first daughter's?

Remember, Mother is speaking directly to the daughters.
and that she will then

taught her how to get (?) for her 30 eggs

as much money as

**her** third daughter for her 50 eggs.

Again, whose third daughter?

Obviously, if 10 eggs are worth 30 eggs, which are worth 50 eggs,

we are dealing with **different** unit prices.
Let all of you three get equal money and let

the price be equal.

"Equal money" is clear . . . but what is "equal price"?

*Aren't the prices all different?*
Beside that, I would like that all of you sell all of your eggs so that total sum of money be integer number

*not less then 10 dollars for 10 eggs and for all 90 eggs not less than 90 dollars.*"

"10 dollars for 10 eggs" means "$1 per egg".

"90 dollars for 90 eggs" means "$1 per egg".

How can a total sum be "not less then $1 per egg"?