Sunland Windows manufactures and sells customsotm windows for three$-$soson porches Sunland also provides installation service for the windows. The installation process does not liwol we changes in the whdows so this service can be performed by other wendors. Sunland enters into the following contract on July $1,2025,$ with a locat homeowner The customer purchases windows for a price of $$2\mathrm{.}620$ and chooses Sunland to do the installation Sunlaha charbes the same priee for the windows lrrospective of whether it does the installation or not. The customer pays Sunhand $$1\mathrm{.}946$ which equals the standalone selline prlee of the windows which have a cost of $$1\mathrm{.}200)$ upon delivery and the remaining bal ance upon mastallation of the windows. Thu windows are dellvered on september $1,2025.$ Sunland completes installation on October $15\mathrm{.}2025,$ and the cistomer pavs the balanee due

$($a$)$ intumediate calculators.

$($tiv$)$

Giyen wobertaint of finding skilled labor, Sundand is unable to develop a reliable estimate for the standalone selling price of the Intallations $($Can you answer the second part of this question$)$