Paul purchased 3 video games for $17.25 each. which expression is the best choice to him determine the total amount of money he spent?

a: (3)(−17.25) = −51.75; he spent $51.75

b: (−3)(17.25) = −51.75; he spent $51.75

c: (3)(17.25) = 51.75; he spent $51.75

d: (−3)(−17.25) = 51.75; he spent $51.75