Difficult Excel Formula

[LisaVelthuizen]

I am making a calculator for my website (i make the calculator in the program excel), but i don't know which formula i must take and how to fill it in.

It is a formula where the answer depends on the input and bandwidth of the input.

Below the input en output:

Input: ≤30.000 --> the answer must be 800.

between 30.000 and 60.000 -> every 1.000 upon the 30.000, but till an input of 60.000 --> the answer increases with 19,5 upon the first 800. So 60.000 must have the answer 800+ (30*19.5) = 1.385

Between 60.001 and 100.000 -> every 1.000 upon the 60.000, but till an input of 100.000 --> the answer increases with 15,60 upon the 1.385. So 100.000 must have the answer 800+ (40*15.60) = 2.009.

This principle continues. In numbers:

Input: Output:
≤30.000 -> answer = 800
30.001 - 60.000-> per 1.000 upon the input, the answer increases with 19.50 above the first 800.
60.001 - 100.000 > per 1.000 upon the input, the answer increases with 15.60 above the first 800+19.50 per 1.000(see line before).
100.001 - 200.000 -> per 1.000 upon the input, the answer increases with 7.80 above the first 800+19.50 per 1.000+ 15.6 per 1.000(see line before).
200.001 - 500.000 -> +5.85 per 1.000 ( but again above the first answers)
500.001 - 1.000.000 -> + 4.875 per 1.000 (but again above the first answers)
1.000.001 and higher -> +2.925 per 1.000 (but again above the first answers)

These numbers has to fill in one formula. Does anybody know which formula i can use and how i use it?

 

[Dave Patton]

Excel 2010
	A	B	C	D	E	F	G
1	1,000,000.00	6,981.50			Bracket	Rate	rDiff
2	or	6,981.50			0	2.67%	2.67%
3					30000	1.95%	-0.72%
4					60000	1.56%	-0.39%
5					100000	0.78%	-0.78%
6					200000	0.59%	-0.20%
7					500000	0.49%	-0.10%
8					1000000	0.29%	-0.20%
3a

Cell Formulas
Range	Formula
B1	=(A1>0)*MAX(800,SUMPRODUCT(--(A1>rB),A1-rB,rDiff))
B2	=(A1>0)*MAX(800,SUMPRODUCT(--(A1>{0;30000;60000;100000;200000;500000;1000000}),A1-{0;30000;60000;100000;200000;500000;1000000},{0.0266666666666667;-0.00716666666666667;-0.0039;-0.0078;-0.00195;-0.000974999999999999;-0.00195}))
F2	=800/30000
G2	=F2-N(F1)

Named Ranges
Name	Refers To	Cells
rB	='3a'!$E$2:$E$8
rDiff	='3a'!$G$2:$G$8

 

[Eric W]

Same idea, slightly different implementation:

	A	B	C	D	E
1	Value		limit	rate	differential rate
2	1000000		0	0	0
3			30000	19.5	19.5
4	Output		60000	15.6	-3.9
5	6981.5		100000	7.8	-7.8
6			200000	5.85	-1.95
7	6981.5		500000	4.875	-0.975
8	6981.5		1000000	2.925	-1.95

<tbody>
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Sheet1​

Worksheet Formulas Cell Formula A5 =800+SUMPRODUCT((A2-C2:C8)/1000,E2:E8,--(A2 > C2:C8)) A7 =800+SUMPRODUCT((A2-{0,30000,60000,100000,200000,500000,1000000})/1000,{0,19.5,-3.9,-7.8,-1.95,-0.975,-1.95},--(A2 > {0,30000,60000,100000,200000,500000,1000000})) A8 =800+SUMPRODUCT((A2/1000-{0,30,60,100,200,500,1000}),{0,19.5,-3.9,-7.8,-1.95,-0.975,-1.95},--(A2/1000 > {0,30,60,100,200,500,1000})) E3 =D3-D2 <tbody> </tbody>

<tbody>
</tbody>

It's easiest to maintain the formula if you put the values in a table. The A2 formula does that using C1:E8. If you really want, you can embed the table within the formula, like A7 or A8.

Also, I'm not sure where you are located, but you may need to change the delimiters within the formulas from a comma (,) to a semicolon ( ; ).