SUMPRODUCT Conditional Formatting

Hello all,

Attempting to write a weighted average with multiple conditions. Having trouble with multiple aspects of the formula.

1)Instead of being equal too text (e.g. --(F:F="Apples") I attempted wrote my formula as you would to be NOT equal to the text (e.g --(F:F<>"Oranges")). This is because there are multiple unique variables which exist in my data so it is easier to just exclude "Apples". I could manipulate the data so that these multiple variables all roll up to one unique variable "NOT APPLES", but would prefer to keep the current structure.

2)One Condition I wrote is greater than a date. It is linked to a cell but I attempted to write this as you would for an IF Condition (E:E>=&A1)

This could be a simple quotation mark or other formatting error. Finding information on this specific situation was difficult. Any help is greatly appreciated Actual Formula I used is below:

=SUMPRODUCT(--('Loan Level Data Query'!$B:$B='Lookup Logic'!B1),--('Loan Level Data Query'!$L:$L>='Lookup Logic'!B2),--('Loan Level Data Query'!$E:$E<>"Conventional"),--('Loan Level Data Query'!$J:$J<>"Corespond"),('Loan Level Data Query'!$D:$D,'Loan Level Data Query'!$F:$F))/SUM('Loan Level Data Query'!$D:$D)