Much will 12 books cost? What is the point which represent the 12 books cost? books
3
E
H
F
COST
point
B
с
D
304
27
24
21
18
15
12
D
9
c
B
6
3
3 6 12
15
18 21
21
27
30 33
36
39
18. P-6.G 9.-27.-12.j-36... THE POINT OF 12 BOOKS COST ISC
OE-6 P-18.69.-27.1-12.-36... THE POINT OF 12 BOOKS COST ISD
Оe E-6.-18.6 27.-9.-12.)
36. THE POINT OF 12 BOOKS COST IS B