Answer:
1) Actual cost was $5,762.50
2) Joe's birthday is on January 1st.
Step-by-step explanation:
1) To find this, since we know they were wrong by an identical amount and one was over and the other was under, we can average the cost to find the difference between the amounts. Then we can add that difference to the lower (or subtract it from the higher) amount:
6950 - 4575 = 2375
2375 / 2 = 1187.50
4575 + 1187.50 = $5,762.50
2) Joe could turn 21 on January 1st, but was 20 on December 31st. Next year Joe would turn 22 on January 1st.
I hope this helps!
-TheBusinessMan
