Which calculation should be completed first to solve this story problem?

toni bought a soccer ball, 3 water bottles, and a pair of shin pads. the soccer ball cost $34.99, each water bottle cost $5.49, and the shin pads cost $18.98. she had to pay $4.93 in sales tax. how much change would toni get from $90.00?

a.
the change

b.
sum of the cost of 1 ball, 1 bottle, and 1 pair of shin pads

c.
sum of the cost of 1 ball, 3 bottles of water, and the tax

d.
total cost of 3 water bottles