Joining 2 tables on specific date condition

[McDanny]

In Qlik Sense I have these tables:
Costing:
Load
OBJNR,
Order,
OrderType,
MaterialGroup,
Material,
Description,
PostingDate,
Quantity,
UnitOfMeasure,
B_MAT_ORD,
B_TIM_ORD,
B_TOT_ORD,
B_MAT_COS,
B_TIM_COS,
B_TOT_COS,
A_MAT_ORD,
A_TIM_ORD,
A_TOT_ORD,
DIFF_MAT_ORD,
DIFF_TIM_ORD,
DIFF_TOT_ORD
From $(vPadQVD)MTO_Costing.qvd(qvd);

and

SalesBudget:
Load
sales_price_valid_from,
Material,
B_TIM_H_PROD_SAL,
B_TIME_H_ENG_SAL,
B_SMALL_PART_SAL,
B_UL_PLATE_SAL,
B_MAT_SAL,
B_MAT_TOT_SAL,
B_TIM_PROD_SAL,
B_TIM_ENG_SAL,
B_TIM_TOT_SAL,
B_TOT_SAL,
B_MARG_PERC_SAL,
B_MARG_SAL,
B_PRICE_SAL
From $(vPadQVD)MTO_Sales_Budget.qvd(qvd);

The key is field Material.
Table SalesBudget can have multiple rows with the same value for Material, with each a different date value in sales_price_valid_from.
I want to add the fields of table SalesBudget to table Costing,
where the date in sales_price_valid_from of table SalesBudget is the MOST RECENT AND BEFORE the date PostingDate of table Costing.
How do I do that?

Thanks,

McDanny