Macro - Create / Copy / Paste Formula every 5 rows for varying range

We have a file that exports to excel badly. We have the need to create a formula to copy A6 & B6 to K3 & L3, THEN copy this formula down K & L through the length of data on the current sheet.

The 2 problems are;

1. There are 5 blank rows between each formula

2. There is a varying length of data at each run - we can use column C to indicate length

Any advice would be greatly appreciated.

Thanks,

Jill