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[Elaref_S_BEN_OTMAN]

			quantity of books to be ordered
		specs	1000	2000	3000	5000
		Internal papers type
		paper 170 grams 4 colors	$22.00	$20.50	$19.00	$17.00
		paper 135 grams 4 colors	$20.00	$18.00	$17.25	$16.15
		Paper 90 grams 4 colors	$18.00	$17.00	$15.95	$15.25
		Paper 80 grams 1 color	$14.00	$13.50	$12.25	$11.75
		Book's cover type
		Hard Cover Br. 2000 grams with sulfan	$55.00	$50.00	$46.00	$43.00
		Normal Cover Br. 300 grams with sulfan	$33.00	$31.00	$29.50	$28.00
						The function is = Type of internal papers cost wit refernce to number of printed books  + Type of the book"s cover chossed

Spoiler

I do ask How to use an easy function to automate the equation of counting the price please note tha

[#2]

Your question appears to be incomplete. Can you complete it.

[#3]

Thank you for your hint  Robbins @Doug_Robbins_Word_MVP 

The question is how can make a function or a scenario so I let the user that help him choose the number of pages, type of cover, and the quantity of the printed books as those are the major factors to evaluate the price of the printed books, note that the data are applicable to expand to several tens of items.

[#4]

@Elaref_S_BEN_OTMAN 

The way I would go about it would be to create a userform containing either radio buttons or comboboxes for each of the variables:

Number of pages

Paper type

Cover type

and then, depending upon the selections made, compute the cost based on those selections

[#5 · Accepted solution]

@Elaref_S_BEN_OTMAN 

For 2-way lookups reverting to INDEX/MATCH is often simplest.

The alternative formula takes advantage of Excel 365 to create a more verbose formula

= LET(
    qtyLevel,    XMATCH(qtyOrdered,volume,1),
    paperOption, XMATCH(paperOrdered,paperType),
    coverOption, XMATCH(coverOrdered,coverType),
    cost, INDEX(paperCost, paperOption, qtyLevel)
        + INDEX(coverCost, coverOption, qtyLevel),
    IFERROR(cost, "")
  )

[#6]

Peter I do appreciate so much your reply.