#### Cost-price, selling-price and profit.

1.   The table below shows cost-price, selling-price, profit margin and profit for a number of articles.

1.1            1.2             1.3              1.4              1.5              1.6              1.7              1.8
Cost-price          23,10      871,20         1 186          43,6               k                 n                 q                 s
Selling-price           a               c                e                 g             63,18         515,21        171,82         61,07
Profit margin (%)   45            40                f                 h                m                 p              38,5            14,2
Profit                       b              d           395,29         10,90           34,46         202,96            r                  t

1.9            1.10           1.11            1.12            1.13            1.14            1.15            1.16
Cost-price           2,75           8,36             y                aa               cc            22,39             hh             27.08
Selling-price           u              w        14 424,74        39,89         524,20           ee             65,24             kk
Profit margin (%)   33             x                z                40               320              65              gg              250
Profit                      v             2,76        1 881,49         bb               dd                ff               21,16            mm

2.
The table below shows the cost-price, selling price, profit margin, profit and discount given for
a number of articles. Calculate the value of each letter in the table:
Number
2.1
2.2
2.3
2.4
2.5
Cost-price
58,23
123,65
2,08
13,45
86
Selling price
78,61
173,11
2,77
24,88
139,32
Profit margin
35
40
33,33
t
y
Profit
a
f
n
11,43
53,32
Discount
b
g
p
2,49
16,72
Discount percentage
10
12
15
u
z
New selling price
c
h
q
v
aa
New profit
d
k
r
w
bb
New profit margin
e
m
s
x
cc
Number
2.6
2.7
2.8
2.9
Cost-price
207
832,42
906,88
8,64
Selling price
869,40
kk
rr
ww
Profit margin
dd
150
280
55
Profit
662,40
1 248,63
2 539,26
4,75
Discount
130,41
mm
ss
xx
Discount percentage
ee
25
32
5
New selling price
ff
nn
tt
yy
New profit
gg
pp
uu
zz
New profit margin
hh
qq
vv
ab
 3. A shopkeeper sells a certain item at a profit of 10%. The cost-price of the item is R18,52. 3.1.1 Calculate the selling price. 3.1.2 Calculate the profit. 3.2 The cost-price of the item increases by 70%. 3.2.1 Calculate the new cost-price. 3.2.2 Calculate the new selling price. 3.2.3 Calculate the new profit. 4. The price of petrol is R5,40 per litre. The price is increased to R5,75. 4.1 Calculate the increase in price. 4.2 Calculate the percentage increase in the price of petrol. 4.3 The price of petrol is again increased by 12,2%. Calculate the new price. 5. The cost per unit of electricity in a certain area is 28 cents. A household uses 850 units per month. The cost of electricity is increased by 8,75%. Calculate 5.1 the new unit-price. 5.2 the new cost for the household. 6. The price of electricity is 26 cents per unit. The price is now increased by 13,5%. 6.1 Calculate the new price per unit. 6.2 The following year consumers are given two options. Show your calculations to determine which is the better option for the consumer. Option 1: An increase of 30% in the price this year followed by an increase of 20% the following year. Option 2: An increase of 50% this year followed by no increase the following year. 7. A company uses 8 000 litres of diesel per month. The cost of diesel is R6,80 per litre. 7.1 Calculate the monthly cost of the diesel. The cost of diesel is increased by 45 cents per litre. 7.2 Calculate the new price of the diesel. 7.3 Calculate the new monthly cost for the fuel. 7.4 Calculate the percentage increase in the price of diesel and of the monthly cost of the fuel.