Ray cupple bought a basic car costing $26,500.00, with options costing $725.00. there is a 6% sales tax in his state and a combined $50.00 license and registration fee. what was ray's total cost?
a. $28,865.00
b. $28,911.50
c. $27,275.00
d. $28,908.50

Each person in an it department of 25 people works on at least one of 3 major projects: system security, program implementation, platform development. 10 people work on system security, 13 work on program implementation, and 12 work on platform development. 4 people work on system security and platform development, 5 people work on program implementation and platform development, and 2 people work on all three projects. how many people work on system security and program implementation?