Answer :
[tex]all\ purchases=3*18\$+2*3.99\$+45\$=\\
36\$+7.98\$+45\$=88,98\\\\
Now\ find\ 8.5\%\ of\ cost\ of\ purchases:\\
8.5\%*88,98=0.086*88,98=7,5633\$\\\\
To\ cost\ pf\ purchases\ add\ tax:\\
88.98\$+7.56=96,54\$\\\\
He\ will\ pay\ 96.54\$.[/tex]
Answer: 116.07
P
=
(
3
×
$
18
+
2
×
$
3.99
+
$
45
)
×
1.085
=
P
=
(
$
54
+
$
7.98
+
$
45
)
×
1.085
=
P
=
$
106.98
×
1.085
=
P
=
$
116.07
Step-by-step explanation: