Very impt..i'm an aspiring writer, i gotta a letter of intent from leadstart publishers plz help?

i have submitted my work to leadstart and they offered me a proposal, that we have a partnership program based on which we have to share costs and profits , they offered me royalty also my doubt is do i have to pay to the publisher, and also get my royalty.it doesn't make any sense,and why should i pay?does... show more i have submitted my work to leadstart and they offered me a proposal, that we have a partnership program based on which we have to share costs and profits , they offered me royalty also
my doubt is do i have to pay to the publisher, and also get my royalty.it doesn't make any sense,and why should i pay?does all authors pay to the publishing house.please help me out ?
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