Final answer:
Alpert Corp.'s foreign-derived intangible income is increased by the sales transactions with Rupert Corp., Janis Corp., and Rogers Corp.
Step-by-step explanation:
The transactions that increase Alpert Corp.'s foreign-derived intangible income are:
- Rupert Corp. (a foreign corporation) for use in its dental centers in Texas
- Janis Corp. (a foreign corporation) for use in its dental centers in Canada
- Rogers Corp. (a foreign corporation and related party) for use in its dental centers in Mexico
These transactions increase Alpert Corp.'s foreign-derived intangible income because they involve sales of dental equipment to foreign corporations for use in their dental centers in different countries.