a
)
(
____________________
x
500
)
+
(
____________________
x
200
)
+
(
100
+
35
)
=
1
,
735
.
b
)
(
____________________
x
300
)
+
(
____________________
x
100
)
+
(
____________________
+
170
)
=
1
,
570
.
c
)
(
____________________
x
1
,
000
)
+
(
____________________
x
500
)
+
(
____________________
x
30
)
=
2
,
590
.
