Based on current pricing levels.
If you already own Adroit Toolkit then the most cost effective option is to purchase LSSP XL rather than LSSP 101 because for a small amount more you will end up with the entire suite of modules.
Upgrading from Adroit Toolkit to LSSP XL
The most economical option for new customers is to purchase LSSP XL but many people have already purchased the Adroit Toolkit bundle so in return for your early support the upgrade from Adroit Toolkit to LSSP XL is discounted by the current price of Adroit Toolkit.
Adroit toolkit costs $25.
LSSP XL costs $69.
So the upgrade from Adroit Toolkit to LSSP XL is $69 – $25 = $44.
Total cost = $25 + $44 = $69.
Upgrading from LSSP 101 to LSSP XL
You may need longer than the free trial period to evaluate LSSP so might opt to purchase LSSP 101, if so you will still be able to recoup most of your money if you decide to upgrade to LSSP XL later.
LSSP 101 costs $29.
LSSP XL costs $69.
Discount for upgrading from LSSP 101 to LSSP XL = $25
So the upgrade from LSSP 101 to LSSP XL is $69 – $25 = $44.
Total cost = $29 + $44 = $73.
Buying all bundles separately
The least cost effective upgrade path is to buy each bundle separately.
Adroit toolkit costs $25.
LSSP 101 costs $29.
LSSP XL costs $69.
Discount for upgrading from Adroit Toolkit or LSSP 101 to LSSP XL = $25.
So the upgrade still costs $44.
Total cost = $25 + $29 +$44 = $98.