A:Log-On Café, the equation is C = $0.15M + $5.50, and I'll save $0.75
B:Log-On Café, the equation is C = $0.55M + $1.50, and I'll save $6.25
C:eCafé, the equation is C = $0.20M + $4.00, and I'll save $0.75
D:eCafé, the equation is C = $0.40M + $2.00, and I'll save $6.25