Forgot to settle the $$$. Let me attempt to sort it out.

Amount paid:

MM = 3+x, x = carrot cake
TKM = 5+1.50
MQ = y+4z, y = satay, z = sugar cane
KKF = 1.50

Total = 3+x+5+1.50+y+4z+1.50 = 11+x+y+4z

Amount each is suppose to pay = (11+x+y+4z)/4 = 2.75+z+(x+y)/4

MQ treats KKF to sugar cane. Therefore, amount each suppose to pay is:

MQ = 2.75+2z+(x+y)/4
KKF = 2.75+(x+y)/4
TKM/MM = 2.75+z+(x+y)/4

For the purpose of working out who owes who $$$, i propose the concept of a "central pool" of $$$ to which those who are "under par" must contribute and from which the relevant people can claim.

The following owe the central pool:

KKF = 2.75+(x+y)/4 - 1.50 = 1.25+(x+y)/4

The following might owe or can claim. If the sum is +ve the person owes the pool. If -ve the person claims.

MM = 2.75+z+(x+y)/4-(3+x) = -0.25+z+(y-3x)/4
MQ = 2.75+2z+(x+y)/4-(y+4z) = 2.75-2z+(x-3y)/4
TKM = 2.75+z+(x+y)/4 - (5+1.50) = -3.75+z+(x+y)/4

For a while i almost thought i could work out x, y and z by simultaneous equations until i realised MM, MQ and TKM are variables as well.

Oh shoots... i realised calling someone a variable can be quite insulting... and a constant for that matter... anyway that's besides the point.

It would be quite helpful if people can provide values for x, y and z. The whole thing will be quite easy to work out by plugging values into the equations.

OR... we can forget about this whole $$$ thing and just be very glad for the good food and wonderful company. And mostly because i have a good feeling TKM owes the pool.

p.s. Please do not ask the "Babe" about that piece of information.