Topics 52-55 (Maths) Flashcards

1
Q

Three period moving totals

A

Yr1 + Yr2 + Yr3
÷
3

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2
Q

8 year moving total

A

4pmt1 + 4pmt2 = 8ymt

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3
Q

Four period moving averages

A

8 year moving total
÷
8

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4
Q

Line of best fit definition

A

The line of best fit should pass through the coordinates (X,Y) where X is the average of the years and Y is the average sales.

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5
Q

Line of best fit formula for x

A

∑X (total years)
÷
N (number of years)

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6
Q

Line of best fit formula for y

A

∑Y (total sales in the trend)
÷
N (number of years)

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7
Q

Variation from the trend

A

Actual sales - trend

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8
Q

Correlation coefficient

A

∑XY
÷
√ (∑X2) (∑Y2)

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9
Q

Cumulative net cash flow definition

A

Cumulative net cash flow shows the amount left of a project’s initial cost left to pay back in brackets. Once this number gets to zero, do not put brackets.

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10
Q

Simple payback formula and when is it used

A

If it goes past zero but does not land on zero, use this formula to see how many months it is

Amount required (left to pay after previous year)
÷
Net cash flow that year

x 12

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11
Q

Average (accounting) rate of return (ARR)

(Steps not formula)

A
  1. Inflows - Outflows
  2. Sum of net cash flows
  3. Minus Initial Cost
  4. Divide by timeframe
  5. Divide by initial cost
  6. X 100
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12
Q

Present value

A

Net cash flow X discount rate

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13
Q

Net present value

A

Total present value - initial cost

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14
Q

Expected monetary value (EMV)

A

(p) x (expected profit) + (p) x (expected profit)
(sucess) + (failure)

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15
Q

Rollback technique

A

Rollback technique is where the EMVs are worked out right to left. When two nodes go into one (a decision node), minus any costs of that option.

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16
Q

Total float

A

LFT of next activity - EST of last activity - duration

17
Q

Free float

A

EST of next task - EST of last task - duration

18
Q

Finding the EST

A

left to right, top right corner

19
Q

Finding the LFT

A

right to left, bottom right corner

20
Q

Net Gain

A

EMV - Initial cost

You must do this when it says ‘revenue’ on the right of the decision tree.