Answer:
<em>The shop spent $56 originally. </em>
Step-by-step explanation:
Suppose, the shop spent
dollars originally.
Given that, the total cost is 150% of what the shop spent originally. So, <u>the total cost will be</u>:
dollars.
The shop sells you a bicycle for $63 and a helmet for $21. So, <u>the total cost</u> 
Thus, the equation will be.........

So, the shop spent $56 originally.