Solving the Excel Challenge

Employer
[no-member:pro]Сергей[/no-member:pro]
Project parameters
Type of cooperationOne-time project
SectionEducation and consulting
Prepaymentwithout prepayment
Payment methodsBank transfer, Electronic money
Acceptance of requestsfrom 2019-07-04 until 2019-07-06
Project description
You need to solve the problem with a full explanation of what is happening, with the highlighting of individual colors: green - variables, blue - constraints, red - target function.