Big C Company sells outdoor grilling products, providing gas and charcoal grills, accessories, and installation services for custom patio grilling stations. Respond to the requirements related to the following independent revenue arrangements for Big C products and services.

(a) Big C offers contract MG100 which is comprised of a free-standing gas grill for small patio use plus installation to a customers gas line for a total price of $950. On a standalone basis, the grill sells for $800 (cost $470), and Big C estimates that the fair value of the installation service (based on cost-plus estimation) is $200. Big C signed 15 MG100 contracts on May 30, 2024, and customers paid the contract price in cash. The grills were delivered and installed on June 15, 2024. Prepare journal entries for Master Grill for MG100 in May AND June 2024. Journal entry descriptions are not required. MUST SHOW THE DETAIL OF ALL CALCULATIONS.

(b) Big C sells its specialty combination gas/wood-fired grills to local restaurants. Each grill is sold for $1,200 (cost $670) on credit with terms 2/20, net/60. Prepare the journal entries for the sale of 20 grills on August 1, 2024, AND upon payment, assuming the customer paid on September 29, 2024. Assume the company records sales net. Journal entry descriptions are not required. MUST SHOW THE DETAIL OF ALL CALCULATIONS.