Grade 12 - More exercises : answers.
Cost and selling price, profit, VAT.
1.1
a = 11,5
; b = 103,5
1.2
c = 10,91
; d = 207,24
1.3
e = 6,5
; f = 58,90
1.4
g = 7,5
; h = 754,8
1.5
j = 8
; k = 63,52
1.6
m = 415,5
; n = 15
1.7
p = 328
; q = 41
2.1
a = 3,64
; b = 49,16
2.2
c = 6,45
; d = 32,25
2.3
e = 65
; f = 41,25
2.4
g = 321,54
; h = 33,3
2.5
j = 645,24
; k = 15
2.6
m = 18
; n = 3,83
2.7
p = 48,24
; q = 4,1
3.1
a = 2,1
; b = 17,1
3.2
c = 5,08
; d = 41,33
3.3
e = 118,84
; f = 16,64
3.4
g = 502
; h = 70,28
3.5
j = 112,63
; k = 917,14
3.6
m = 7,79
; n = 63,43
3.7
p = 81,28
; q = 11,38
4.1
The total
cost is equal to the number of cards multiplied by 5 ; c = 5n
4.2
The total
income is equal to the number of cards sold times 8 ; a = 8q
4.3
profit =
income - cost ; P = 8q - 5n
4.4.1
You make
a profit : total income is bigger than total cost.
4.4.2
You still
make a profit : P = 8n - 5n = 3n > 0 [remember q = n].
4.4.3
You break
even if q = (5/8)n. If q is smaller than (5/8)n, then you make a loss.
4.5
If q is
smaller than (5/8)n, you make a loss.
4.6
1 200 cards
5.1
R2,50
5.2
100%
5.3
1 800 cards
5.4
New
cost = R2,95 and new profit = R2,05
5.5
2196 :
you can only sell a whole number of cards.
5.6
R5,90