Instruction: Parse the product information to locate the target attribute, and then provide the extracted value of the target attribute and its source in the output, specifying None if the attribute is not present.

Input:
Product title: (3 Pack Value Bundle) SHREL233SB EL233SB Pocket Calculator, 8-Digit LCD
Product description: Well-spaced roomy keyboard. Soft rubber keys for comfort. Auto power off. Power Source(s): Battery; Display Notation: Numeric; Number of Display Digits: 8; Memory: 3-Key.
Product feature: Save money on shipping and buy in bulk lots of 3. Specifications below refer to each item individually. If you have any questions about the listing please email Customer Service.
Product price: $11.50
Product brand: SHREL233SB
Target attributes: Type
Answer: attribute: type
value: pocket
source: product title