a)
1..... 60
3.......180
5.......300
8........480
9........540
11.......660
b)
1........2,5
4........10
6........15
7.........17,5
11.......27,5
9.........22,5
c)
100.....7
50........3,5
150......10,5
d)
8.............1
10............1,25
15............1,875
20.............2,5
60.............7,5
30..............3,75