The document outlines the payment schedule for 2200 sq. ft. and 2950 sq. ft. apartments in Block C-3 and C-4, detailing the basic sale price, external and infrastructure development charges, and preferential location charges. It provides a detailed installment-payment plan based on construction milestones, including various percentages of the basic sale price and additional charges at each stage. Additional notes include costs for interest-free maintenance security, stamp duty, car parking requirements, and the possibility of price revisions.