I cannot seem to get my head around creating this function. I am trying to
create a pricing algorithm and cannot figure out the correct sequence of
writing the function. Here is what i am up against:

IF J3<$24.99 then add J3 plus $10.00
IF J3$25.00 but < $49.99 then add J3 plus $15.00
IF j3$50.00 then add J3 plus $20.00

Can this be written to one cell and if so how?
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Thank you for your help, it is greatly appreciated.