The ratio of the sales tax to the amount of a purchase is a fixed number in Town . The table shows the sales tax for a purchase of . Part A What is the sales tax for a purchase of ​ A $18.06\$ 18.06$18.06 B $34.72\$ 34.72$34.72 C $144.00\$ 144.00$144.00 D $150.00\$ 150.00$150.00 (b) ​ Part B What is the cost of an item with a sales tax of ? A $432\$ 432$432 B $648\$ 648$648 C $1,092\$ 1,092$1,092 D $1,800\$ 1,800$1,800 ​