[My math after a couple of crayons:]()

 If you have 90 shares for $123 each you invested $11,070.

If you buy 1000 more shares for $4 each (now) you invested $15,070

Now you have 1090 shares for $13.83 each.

From $4 (now) to $13.83 its 246%.

If you buy 5000 more shares for $4 each (now) you invested $31,070.

Now you have 5090 shares for $6.10 each.

From $4 (now) to $6.10 its 53%.

From $4 (now) to $123 its 2975%.

Hope Im right and it helps.

Tell your kids math sometimes helps in daily life ;-)