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For a project we are creating care packages for the homeless. I am trying to figure how many kits to make for the least leftover material as the things we are putting into the packages are sold in different units/case. I have every item filled into a sheet in excel with formulas that take the changing value, the number of kits, and runs through a bunch of calculations in multiple different cells, eventually ending up in the result cell, the cost, rounded to the nearest case. Photo for clarity:

enter image description here

B1 is my changing cell and B4 is my result.

Now my problem arises when I want to create a line chart that shows the cost to make different number of kits. I would like the X axis to be 50-200 and the Y axis to be the theoretical cost(cost per kit * number of kits) and the real subtotal(cost per kit to the nearest case of each item). Could I do this? and how?

I don't have one singular formula to calculate the real subtotal as there are so many different items coming in different cases and prices.

  • You chart data rather than a formula. You would need to build a table of the X and Y values (derived from your existing formulas), and then chart the result. – fixer1234 Aug 11 '15 at 4:02
  • As fixer1234 wrote, you need a table to be able to plot the chart. Are only the highlighted cells calculated in your sheet. Most important: is "units per kit" fixed across scenarios? – Máté Juhász Aug 11 '15 at 4:36
  • Everything that is highlighted in yellow is calculated. "Units per kits" is fixed across scenarios. In fact, the only thing I am changing is the number of kits – user481983 Aug 11 '15 at 5:46
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To chart real vs theoretical cost, first you need to calculate them against the number of kits:

enter image description here

Formulas:

  • Theoretical cost: =A21*SUMPRODUCT($E$6:$E$16,$D$6:$D$16)
  • Real subtotal: =SUMPRODUCT(ROUNDUP(A21*$E$6:$E$16/$C$6:$C$16,0),$B$6:$B$16) - this is an array formula, so you need to finish it by CTRL+SHIFT+ENTER
  • I've included also a "real / theoretical" cost column, which just divide real subtotal by theoretical cost, so it gives you also the information how much "extra" you spend over real value of the kits
  • NOTE: input range is the same as posted in the question

Chart:

  • instead of a single chart, I suggest to use pivot chart, this enable also filtering of input data (zoom to specific range to see costs better)

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